@article{2-s2.0-105033082558,

title = {Conversion of titanite to rutile during the albitization of granitoids from the Sakar Batholith, SE Bulgaria: Experimental studies},

author = { A. Gumsley and D.E. Harlov and R. Juroszek and B. Marciniak-Maliszewska and P. Jokubauskas and I. Gerdjikov},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-105033082558&doi=10.2138%2fam-2024-9731&partnerID=40&md5=038e75abf8efe3c198c6134173d5f0e5},

doi = {10.2138/am-2024-9731},

issn = {0003004X},

year  = {2026},

date = {2026-01-01},

journal = {American Mineralogist},

volume = {111},

number = {3},

pages = {461-475},

publisher = {Walter de Gruyter GmbH},

abstract = {Petrological studies of the Sakar granitoid batholith (SE Bulgaria) have revealed that rutile-rich aggregates were formed from titanite during albitization and desilification of the granitoid at ∼600 °C and ∼300 MPa. Titanite conversion to rutile has been tested experimentally. Four experiments involving fluid-Aided alteration of titanite in a granitic system were conducted using cold-seal pressure vessels on a hydrothermal line at 280 MPa and 600 °C. The starting material included titanite, fluorapatite, and a powdered, unaltered, natural granite from the Sakar Batholith. Four Na-bearing aqueous fluids (NaCl+H2O; NaF+H2O; Na2Si2O5+H2O; and 2 M NaOH) were used. Rutile was formed from titanite in experiments involving NaCl+H2O (RT-1) and NaF+H2O (RT-2). The mineral assemblage formed in RT-1 consisted of rutile, Ti-Th-U oxides, and monazite, whereas in RT-2 rutile, fluorite, lorenzenite, albitized plagioclase, REE-enriched rims on fluorapatite, and a glass formed. Rutile did not form in experiments involving Na2Si2O5+H2O or 2 M NaOH. The comparison between natural observation and the experimental results supports the premise that a NaCl+H2O fluid could have been responsible for the conversion of titanite to rutile during albitization, which further supports the role of NaCl-bearing fluids during the albitization of granitoids in general at mid-to upper-crustal pressures in the presence of alkali-bearing fluids. This implies that the geochemical relationship between rutile and titanite is more a function of the chemistry of the fluid and host rock, especially if they are Na-rich, rather than the P-T conditions. Subsequently, rutile formed from titanite can be used as a geochronometer for dating the process responsible for both the formation of the rutile and the metasomatism of the rock. Detrital rutile is commonly thought to mostly originate from medium-to high-pressure igneous and metamorphic source rocks. Formation of rutile during albitization and desilification of granitoids under relatively high-Temperature hydrothermal conditions in the upper crust has implications regarding rutile provenance studies of areas sourced by regionally albitized quartzofeldspathic rocks. © 2026 Mineralogical Society of America.},

note = {0},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-105024848464,

title = {Hopmannite, Ba2(Ti5Fe)O13, a new hexatitanate from the Bellerberg volcano, Germany},

author = { R. Juroszek and B. Krüger and G. Cametti and B. Marciniak-Maliszewska and C. Schäfer},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-105024848464&doi=10.1007%2fs00710-025-00959-5&partnerID=40&md5=6130c092110362dbfda31a57398d5a54},

doi = {10.1007/s00710-025-00959-5},

issn = {09300708},

year  = {2026},

date = {2026-01-01},

journal = {Mineralogy and Petrology},

volume = {120},

number = {1},

pages = {227-240},

publisher = {Springer},

abstract = {Hopmannite, ideally Ba2(Ti5Fe)O13, is a new Ba-dominant hexatitanate discovered in xenoliths enclosed within the basaltic host rocks of the Bellerberg volcano in Germany. The mineral exhibits black to dark-grey thin platy crystals, with submetallic lustre and a perfect cleavage along (100). The empirical formula of the holotype hopmannite, calculated on the basis of 8 cations and 13 O atoms, is (Ba1.00K0.61Na0.24Sr0.08Ca0.04)Σ1.97(Ti5.36 Fe2+0.48Fe3+0.13Mg0.06)Σ6.03O13. Hopmannite is monoclinic, space group C2/m, with a = 15.357(2) Å},

note = {1},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-105012597737,

title = {Anningite-(Ce), (Ca 0.5 Ce4+0.5)(VO 4), a new mineral from phosphate coprolite of the Gara Samani Formation, Algeria},

author = { D. Środek and R. Juroszek and G. Cametti and M. Benyoucef and I. Bouchemla and T. Krzykawski and M.A. Salamon},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-105012597737&doi=10.1180%2fmgm.2025.10110&partnerID=40&md5=7c0cd8e8b4904fb8579252b172c739d0},

doi = {10.1180/mgm.2025.10110},

issn = {0026461X},

year  = {2026},

date = {2026-01-01},

journal = {Mineralogical Magazine},

volume = {90},

number = {1},

pages = {131-137},

publisher = {Cambridge University Press},

abstract = {Anningite-(Ce) ideally (Ca0.5Ce4+0.5)(VO4), was found within a phosphate coprolite from the sand-dominated sediments of the Gara Samani Formation, Algeria. As a tetragonal anhydrous vanadate, this mineral is classified in the xenotime group. It occurs in rock cavities and forms small (typically up to 100 m in length) sheaf-like aggregates composed of crystals 30-40 m in length and ∼7 m in diameter. Anningite-(Ce) crystals are green with a vitreous lustre. No cleavage is observed and the fracture is uneven or conchoidal. Its empirical formula, calculated on the basis of 4 oxygen atoms, can be written as (Ca0.52Ce4+0.47Y3+0.01)Σ1.00[(VO4)0.88(PO4)0.05(SO4)0.06(SiO4)0.01]Σ1.00. The calculated density is 3.887 g/cm3. Anningite-(Ce) is tetragonal with space group I41/amd and unit-cell parameters a = 7.1500(4) Å},

note = {1},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-105034394144,

title = {Nomenclature and classification of the jeppeite group},

author = { R. Juroszek and B. Krüger and C. Schäfer},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-105034394144&doi=10.1007%2fs00710-026-00982-0&partnerID=40&md5=5bd222b0a03fd2afdcb78e167d9d6e71},

doi = {10.1007/s00710-026-00982-0},

issn = {09300708},

year  = {2026},

date = {2026-01-01},

journal = {Mineralogy and Petrology},

publisher = {Springer},

abstract = {The jeppeite group, approved by the Commission on New Minerals, Nomenclature and Classification of the International Mineralogical Association (IMA-CNMNC), comprises natural hexatitanate minerals with the general crystal-chemical formula VIIIA2VIM6O13. Currently, three species are recognised: jeppeite K2Ti6O13, nixonite Na2Ti6O13, and hopmannite Ba2(Ti5Fe)O13. In natural compositions, the polyhedral A site is occupied by the monovalent Na and K, and by the divalent Ba, Ca and Sr, whereas the octahedral M sites are predominantly occupied by Ti4+ with possible substitutions by Nb5+, Zr4+, Fe3+, V3+, Cr3+, Fe2+, Mg2+ or Mn2+. These compositional variations give rise to charge-balanced formula schemes, such as A2+M64+O13, characteristic for jeppeite and nixonite, and A22+(M54+M2+)Σ6O13, exemplified by hopmannite. Structurally, jeppeite-group minerals crystallise in the monoclinic system, space group C2/m. Their structure consists of an open framework built from zig-zag ribbons of MO6 octahedra. These corner-sharing ribbons form tunnels that are partially filled, up to two-thirds, by A-site cations. The abundance of synthetic analogues suggests significant potential for additional natural species, which is why nomenclature guidelines have been generated to clarify the classification of future jeppeite-group minerals. © The Author(s), under exclusive licence to Springer-Verlag GmbH Austria, part of Springer Nature 2026.},

note = {0},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85214436097,

title = {Steiningerite, Ba2Zr2(Si4O12)O2, a new cyclosilicate from the Löhley quarry, Germany},

author = { R. Juroszek and B. Krüger and U. Kolitsch and G. Frenz and G. Blaβ},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85214436097&doi=10.1180%2fmgm.2024.102&partnerID=40&md5=58aafb3f22c719057f4a30485159a2ce},

doi = {10.1180/mgm.2024.102},

issn = {0026461X},

year  = {2025},

date = {2025-01-01},

journal = {Mineralogical Magazine},

volume = {89},

number = {6},

pages = {819-829},

publisher = {Cambridge University Press},

abstract = {The new mineral steiningerite, ideally Ba2Zr2(Si4O12)O2, was discovered along fissures and in cavities in melilite nephelinite samples retrieved from the currently active Löhley quarry, Eifel Volcanic Fields, Germany. Steiningerite is associated with minerals of the pyroxene group (augite–diopside), leucite, perovskite, titanite and accessory fluorapatite, fresnoite, wöhlerite, götzenite, fersmanite, magnetite and minerals of the pyrochlore group. It usually forms colourless or creamy white, euhedral, short prismatic to thick tabular, partly pseudocubic crystals up to 100 μm in size but also occurs rarely as individuals reaching 0.5 mm in size. The mineral is transparent to translucent, exhibits a vitreous lustre and no visible cleavage. The calculated density of steiningerite is 3.78 g/cm3. Optically, steiningerite is non-pleochroic and uniaxial (+), with ω = 1.711(3) and ε = 1.750(3) (λ = 589 nm). The empirical formula of holotype steiningerite, calculated on 14 anions, is (Ba1.36K0.56Na0.09Sr0.05Ca0.02)Σ2.08(Zr1.52Ti0.25Nb0.13U0.05Fe0.02Hf0.01)Σ1.98(Si4.00Al0.03)Σ4.03O12(O1.59F0.41)Σ2.00. Steiningerite crystallises in space group P4/mbm, with refined unit-cell parameters a = 8.894(2) Å},

note = {1},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-105017421743,

title = {Rotemite, Ca4Cr2(OH)12Cl2·4 H2O – the trigonal chromium analog of hydrocalumite and Friedel's salt – a new mineral from the Hatrurim Complex, Israel},

author = { K. Skrzyńska and H. Müller and R. Juroszek and B. Krüger and G. Cametti and A.S. Pakhomova and I.O. Galuskina and Y. Vapnik and K.W. Woźniak and E.V. Galuskin},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-105017421743&doi=10.1016%2fj.clay.2025.108002&partnerID=40&md5=f99b5262cfa2ed3753c37812de840a39},

doi = {10.1016/j.clay.2025.108002},

issn = {01691317},

year  = {2025},

date = {2025-01-01},

journal = {Applied Clay Science},

volume = {278},

publisher = {Elsevier Ltd},

abstract = {Rotemite, Ca4Cr2(OH)12Cl2·4H2O, is a newly discovered mineral and the first Cr-bearing member of the hydrocalumite group within the hydrotalcite supergroup. The new mineral is a trigonal chromium analog of both hydrocalumite and its synthetic counterpart, Friedel's salt, representing a large family of novel compounds of lamellar/layered double hydroxides (LDH). This work presents the first comprehensive study of a Ca, Cr-bearing compound within the LDH family. Rotemite was discovered in pyrometamorphic rocks of the Hatrurim Complex, Israel. It forms tiny hexagonal platelet-shaped crystals that appear pale bluish-violet (daylight) to pinkish-violet (artificial light), depending on the type of illumination. The streak is pale light-purple. Optically, rotemite is negatively uniaxial with ω = 1.565(2), ε = 1.544(2) (λ = 589 nm). It has a hardness of 2.5–3 on the Mohs scale. The crystals exhibit perfect cleavage on {0001}. The electron microprobe analyses indicated the empirical formula of (Ca3.94Sr0.01)∑3.95(Cr3+1.47Al0.52Fe3+0.05)∑2.04(OH)12[Cl1.68(OH)0.32(SO4)0.01]∑2.01·4H2O. The calculated density, based on the empirical formula and unit cell parameters obtained from single-crystal X-ray diffraction data, is 2.18 g/cm3. Single-crystal X-ray diffraction measurements have revealed that rotemite represents a 6-layered polytype with trigonal symmetry (R3¯c) and unit cell parameters: a = 5.7944(2) Å},

note = {3},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-105010897186,

title = {Ferroåkermanite, Ca2FeSi2O7- A new mineral from the reduced kirschsteinite-bearing paralava, Hatrurim Complex, Israel},

author = { R. Juroszek and B. Krüger and Y. Vapnik and E.V. Galuskin},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-105010897186&doi=10.1180%2fmgm.2025.10120&partnerID=40&md5=b218a083cd9421afc1247582e1b15f71},

doi = {10.1180/mgm.2025.10120},

issn = {0026461X},

year  = {2025},

date = {2025-01-01},

journal = {Mineralogical Magazine},

publisher = {Cambridge University Press},

abstract = {Ferroåkermanite, Ca2FeSi2O7 - a new member of the melilite group, has been found in coarse-grained kirschsteinite-bearing paralava in the Hatrurim Basin outcrop between Zohar and Halamish Wadies of the Hatrurim Complex in Israel. Ferroåkermanite rarely forms single subhedral light-yellow crystals up to 30-50 μm in size with a prismatic habit. The most common are irregular grains, aggregates and intergrowths with gehlenite, or ferroåkermanite crystals with perovskite inclusions. The mineral is transparent, exhibits vitreous lustre and has a distinct cleavage on (001). It is non-fluorescent, brittle and has a conchoidal fracture, a Mohs hardness of ~4.5-5 and a calculated density of 3.20 g/cm3. Ferroåkermanite is uniaxial (-), ω = 1.652(3) and ϵ = 1.643(3) (λ = 589 nm), and exhibits a visible pleochroism from light-yellow (ω) to intense yellow (ϵ). The empirical formula of ferroåkermanite calculated on 7 O is (Formula presented). The obtained chemical data confirm the presence of ferroåkermanite-gehlenite solid solution (Fe2++ Si4+↔ 2Al3+) in the studied rock, which was verified by Raman spectroscopy investigation. The crystal structure of the new mineral was refined to R = 0.0617 in the space group P421m with the following unit-cell parameters a = 7.7813(7) Å},

note = {0},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85202154360,

title = {Karlleuite Ca2MnO4 – a first mineral with the Ruddlesden-Popper type structure from Bellerberg volcano, Germany},

author = { R. Juroszek and B. Krüger and G. Cametti and B. Ternes and G. Blaβ},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85202154360&doi=10.1007%2fs00710-024-00869-y&partnerID=40&md5=b97178b967f1b4a1fd4766c8d9ef9cfd},

doi = {10.1007/s00710-024-00869-y},

issn = {09300708},

year  = {2024},

date = {2024-01-01},

journal = {Mineralogy and Petrology},

volume = {118},

number = {4},

pages = {569-580},

publisher = {Springer},

abstract = {Karlleuite, ideally Ca2MnO4, is a newly approved accessory mineral found in the xenolith sample within the basaltic lava from the Caspar quarry, Bellerberg volcano, Eifel, Germany. It usually occurs as thin tabular/plate crystals, which range from 40 to 80 μm in diameter, and is associated with other members of the perovskite supergroup such as srebrodolskite, brownmillerite, sharyginite, perovskite, and lakargiite distributed within rock-forming minerals represented by reinhardbraunsite, fluorellestadite, fluorapatite, larnite, gehlenite, and several hydrated Ca aluminosilicates. Karlleuite crystals are brown with sub-metallic lustre, a light brown streak, and a good cleavage along (001). It is non-fluorescent, brittle and has an uneven fracture, a Mohs hardness of 3.5 and calculated density Dx = 3.79 g/cm3. The empirical formula of the holotype karlleuite calculated based on O = 4 atoms per formula is (Ca1.97Ce3+0.06)2.03(Mn4 +0.39Ti0.36Fe3+0.19Al0.09)1.03O4, which shows that it is a multicomponent phase characterised by various substituents at the octahedral site. Karlleuite is tetragonal I4/mmm (no. 139), with a = 3.7683(2) Å},

note = {1},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85205910543,

title = {Correction to: Karlleuite Ca2MnO4 – a first mineral with the Ruddlesden-Popper type structure from Bellerberg volcano, Germany (Mineralogy and Petrology, (2024), 118, 4, (569-580), 10.1007/s00710-024-00869-y)},

author = { R. Juroszek and B. Krüger and G. Cametti and B. Ternes and G. Blaβ},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85205910543&doi=10.1007%2fs00710-024-00872-3&partnerID=40&md5=f6d667df91cda5e19322d6162f4c7dfd},

doi = {10.1007/s00710-024-00872-3},

issn = {09300708},

year  = {2024},

date = {2024-01-01},

journal = {Mineralogy and Petrology},

volume = {118},

number = {4},

pages = {581-},

publisher = {Springer},

abstract = {In the original version of this article, the given and family names of all authors were incorrectly structured, Biljana Krüger has been added as 2nd corresponding author and the e-mail addresses of other co-authors should be removed. The original article has been corrected. © The Author(s) 2024.},

note = {0},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85215659295,

title = {Alfredcasparite, Sr2TiO(Si2O7), a new mineral from the Caspar quarry, Bellerberg volcano, Germany, and new data on wesselsite, SrCuSi4O10},

author = { R. Juroszek and K. Prusik and C. Schäfer},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85215659295&doi=10.3190%2fjgeosci.394&partnerID=40&md5=25177e4cd9469dd67e85fdf331913868},

doi = {10.3190/jgeosci.394},

issn = {18026222},

year  = {2024},

date = {2024-01-01},

journal = {Journal of Geosciences (Czech Republic)},

volume = {69},

number = {3},

pages = {161-172},

publisher = {Czech Geological Survey},

abstract = {The new mineral alfredcasparite, ideally Sr2TiO(Si2O7), is a Sr-analogue of fresnoite Ba2TiO(Si2O7). It is an accessory phase, which was found in a silicate xenolith within the tephritic lava from the Caspar quarry, Bellerberg volcano, Germany. Usually, alfredcasparite occurs together with potentially new mineral (Sr2Na)Ti(Si2Fe)Si2O14, in small cracks in the K-feldspar (sanidine)-quartz-pyroxene (aegirine-diopside)-matrix, and wollastonite. In the type material, alfredcasparite rarely forms flattened crystals up to 30 µm in diameter; more common are irregular grains which do not exceed 15 µm in size. Alfredcasparite is colourless, transparent, and has a vitreous lustre and white streak. It is brittle with an irregular fracture and exhibits good cleavage on (001). The calculated density equals 3.950 g·cm-3 and the Mohs hardness is ~3-4. Optically, alfredcasparite is uniaxial and non-pleochroic under transmitted light (nmean = 1.823). The empirical formula calculated based on 8 O atom per formula unit (pfu) is (Sr1.54Ba0.29Ca0.10Na0.03K0.03)∑1.99(Ti0.94Fe0.04Mg0.03)∑1.01(Si2.04Al0.01)∑2.05O8, which leads to the ideal end-member formula Sr2TiO(Si2O7). According to the electron back-scattered diffraction (EBSD) pattern, tetragonal alfredcasparite fit to the using structural model of synthetic Sr2TiO(Si2O7) with the following parameters: space group P4bm},

note = {1},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85205686436,

title = {Mimetite and polymineralic mimetite-pyromorphite-vanadinite single crystals from the Sowie Mts, Poland},

author = { E. Szełęg and J. Janeczek and R. Juroszek and M. Danila},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85205686436&doi=10.2478%2fmipo-2024-0005&partnerID=40&md5=8f85f612fcfd782bdca59247eca72cad},

doi = {10.2478/mipo-2024-0005},

issn = {18998291},

year  = {2024},

date = {2024-01-01},

journal = {Mineralogia},

volume = {55},

number = {1},

pages = {48-59},

publisher = {Sciendo},

abstract = {Millimeter-sized crystals of mimetite and pyromorphite, and polymineralic mimetite-pyromorphite-vanadinite crystals occur in quartz-baryte vein within paragneisses of the Sowie Mts, SW Poland. Three morphologically different mimetite crystals and a polymineralic crystal were examined by electron probe micro-analysis (EPMA), back-scattered electrons (BSE) imaging, Raman microspectroscopy, and X-ray composition mapping. Mimetite occurs as well-developed crystals, crystals built up of sub-parallel individuals due to autoepitaxial growth, and crystals extensively etched. All of the mimetite crystals are zoned with respect to pyromorphite molecule content with sharp increase up to 23 mol% in the outermost zones. The apparent vanadinite crystal actually consists of oscillatory-zoned pyromorphite + minor vanadinite core, intermediate zones composed of pyromorphite, two mimetite zones intercalated by a band of oscillatory pyromorphite and minor vanadinite, and vanadinite mantle. EPMA data show a limited miscibility between all three minerals in the polymineralic crystal. Most analyzes cluster around 10 mol% of ternary solid solution with the maximum value of ca. 30 mol%. X-ray elemental maps reveal sharp boundaries between compositionally contrasting zones in the crystal core. In mimetite zones, the substitution of As by P does not exceed 0.43 atoms per formula unit (apfu). In the vanadinite mantle, As + P does not exceed 0.30 apfu. The distribution of Pb is uniform throughout the crystal with the highest Ca/Pb ratio of 0.03. The observed sequence of crystallization in the polymineralic crystal can be explained by the relative changes in ions concentrations at the crystal/solution interface, i.e. within the diffusion boundary layer, in accord with the models of the autocatalytic crystal growth. The authors hypothesize that kinetically driven fast growth of the polymineralic crystals resulted in precipitation of discrete mineral phases with very limited anionic substitutions. © 2024 Eligiusz Szełȩg et al., published by Sciendo.},

note = {4},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85167453877,

title = {Minerals with a palmierite-type structure. Part I. Mazorite Ba3(PO4)2, a new mineral from the Hatrurim Complex in Israel},

author = { R. Juroszek and I.O. Galuskina and B. Krüger and H. Krüger and Y. Vapnik and V. Kahlenberg and E.V. Galuskin},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85167453877&doi=10.1180%2fmgm.2023.57&partnerID=40&md5=f13970655cd6e4848ad8c7473640166c},

doi = {10.1180/mgm.2023.57},

issn = {0026461X},

year  = {2023},

date = {2023-01-01},

journal = {Mineralogical Magazine},

volume = {87},

number = {5},

pages = {679-689},

publisher = {Cambridge University Press},

abstract = {The new mineral mazorite, ideally Ba3(PO4)2, a P-analogue of gurimite Ba3(VO4)2, was discovered in rankinite paralava hosted by the massive gehlenite-bearing pyrometamorphic rocks of the Hatrurim Complex in Israel. It has also recently been discovered in xenolith samples from the Bellerberg volcano in Germany. Holotype mazorite usually forms colourless plate-like crystals up to 70–100 μm in length but also occurs in small aggregates in association with other rare Ba-bearing minerals such as zadovite, celsian, hexacelsian, bennesherite, sanbornite, walstromite, fresnoite, gurimite, alforsite and barioferrite. The mineral is transparent, exhibits vitreous lustre and has a good cleavage on (001). Optically, mazorite is uniaxial (+), with ω = 1.760(3) and ε = 1.766(3) (λ = 589 nm). The empirical formula of the holotype mazorite calculated on 8O is (Ba2.69K0.22Na0.04Ca0.02Sr0.01)Σ2.98(P1.16V0.57S0.24Al0.04Si0.03)Σ2.04O8. Mazorite crystallises in space group R̿3m, with unit-cell parameters a = 5.6617(5) Å},

note = {6},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85167462886,

title = {Minerals with a palmierite-type structure. Part II. Nomenclature and classification of the palmierite supergroup.},

author = { R. Juroszek and B. Krüger and H. Krüger and I.O. Galuskina},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85167462886&doi=10.1180%2fmgm.2023.56&partnerID=40&md5=c48665eb78e1e42f28071687b4361422},

doi = {10.1180/mgm.2023.56},

issn = {0026461X},

year  = {2023},

date = {2023-01-01},

journal = {Mineralogical Magazine},

volume = {87},

number = {5},

pages = {690-694},

publisher = {Cambridge University Press},

abstract = {The palmierite supergroup, approved by the IMA-CNMNC, includes five mineral species characterised by the general crystal-chemical formula XIIM1XM22(IVTO4)2 (Z = 3). On the basis of the crystal-chemical arguments and heterovalent isomorphic substitution scheme M++T6+ ↔ M2++T5+, the palmierite supergroup can be formally divided into two groups: the palmierite group M12+M22+(T6+O4)2, and the tuite group M12+M222+(T5+O4)2. Currently, the palmierite group includes palmierite K2Pb(SO4)2, and kalistrontite K2Sr(SO4)2, whereas the tuite group combines tuite Ca3(PO4)2, mazorite Ba3(PO4)2, and gurimite Ba3(VO4)2. The isostructural supergroup members crystallise in space group R̅3m (no. 166). The palmierite-type crystal structure is characterised by a sheet arrangement composed of layers formed by M1O12 and M2O10 polyhedra separated by TO4 tetrahedra perpendicular to the c axis. The abundance of distinct ions, which may be hosted at the M and T sites (M = K; Na; Ca; Sr; Ba; Sr; Pb; Rb; Zn; Tl; Cs; Bi; NH4 and REE; T = Si; P; V; As; S; Se; Mo; Cr and W) implies many possible combinations, resulting in potentially new mineral species. Minerals belonging to the palmierite supergroup are relatively rare and usually form under specific conditions, and their synthetic counterparts play a significant role in various industrial applications. © The Author(s), 2023. Published by Cambridge University Press on behalf of The Mineralogical Society of the United Kingdom and Ireland.},

note = {3},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85153954997,

title = {New data on minerals with the GIS framework-type structure: Gismondine-Sr from the Bellerberg volcano, Germany, and amicite and Ba-rich gismondine from the Hatrurim Complex, Israel},

author = { K. Skrzyńska and G. Cametti and R. Juroszek and C. Schofer and I.O. Galuskina},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85153954997&doi=10.1180%2fmgm.2023.27&partnerID=40&md5=2899d993ed98b2dcdf1f1194fbf461c9},

doi = {10.1180/mgm.2023.27},

issn = {0026461X},

year  = {2023},

date = {2023-01-01},

journal = {Mineralogical Magazine},

volume = {87},

number = {3},

pages = {443-454},

publisher = {Cambridge University Press},

abstract = {Gismondine-Sr, recently discovered in the Hatrurim Complex in Israel, has been recognised in a xenolith sample from the Bellerberg volcano in Germany. The empirical crystal-chemical formula indicates elevated K content: (Sr1.74Ca1.05Ba0.09K1.56Na0.49)Σ4.93[Al7.98Si8.06O32]·9.62H2O. Additionally, Ba-rich gismondine and amicite have been found in the low-temperature mineral association of the pyrometamorphic rock from the Hatrurim Complex. The Raman spectra of the studied zeolites and the crystal structure of gismondine-Sr from the second occurrence are presented. A review of zeolites with GIS framework-type structure leads to the following conclusions: (1) garronite-Na and gobbinsite are equivalent and constitute a solid solution with garronite-Ca; (2) gismondine-Ca, -Sr, and amicite belong to one mineral series; (3) two zeolites series with different R-factors (defined as Si/(Si+Al+Fe)) can be distinguished within GIS topology: the garronite series (R > 0.6) including garronite-Ca and gobbinsite, with general formula (MyD0.5(x-y))[AlxSi(16-x)O32]·nH2O, where M and D refer to monovalent and divalent cations, respectively; and the gismondine series, including amicite, gismondine-Sr and gismondine-Ca, with R ≈ 0.5, and the general formula (MyD0.5(8-y))[Al8Si8O32]·nH2O. The Raman band between 475 cm-1 and 485 cm-1 is distinctive for the garronite series, whereas the band around 460 cm-1 is characteristic of the gismondine series. On the basis of these findings, a revision of GIS zeolites nomenclature is suggested. Copyright © The Author(s), 2023. Published by Cambridge University Press on behalf of The Mineralogical Society of the United Kingdom and Ireland.},

note = {2},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85144361467,

title = {Minerals of the arctite supergroup from the Bellerberg volcano xenoliths, Germany},

author = { R. Juroszek and B. Krüger and B. Marciniak-Maliszewska and B. Ternes},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85144361467&doi=10.1180%2fmgm.2022.103&partnerID=40&md5=c8bc02a3249a92e37406eb270ef6ea51},

doi = {10.1180/mgm.2022.103},

issn = {0026461X},

year  = {2022},

date = {2022-01-01},

journal = {Mineralogical Magazine},

volume = {86},

number = {6},

pages = {929-939},

publisher = {Cambridge University Press},

abstract = {The recently defined arctite supergroup contains nine mineral members defined as hexagonal intercalated antiperovskites, most of which have been found in pyrometamorphic rocks of the Hatrurim Complex, Israel. Three members of this supergroup: nabimusaite, gazeevite and zadovite, were identified for the first time in altered carbonate-silicate xenoliths from the Caspar and Scherer quarries, Bellerberg volcano in Germany. Present work focuses on the chemical, structural and spectroscopic investigation of these minerals and their correlation with holotype counterparts. The apparent differences are mainly related to the chemical composition, types of substitution in the tetrahedral and antiperovskite layers within the crystal structure, and position of bands in the Raman spectra. In the Bellerberg volcano xenoliths, the crystallisation of nabimusaite and gazeevite is caused by high-temperature alteration of early mineral associations (clinker-like phases) and their reaction with melt or gas generated by volcanic activity. In turn, the formation of zadovite is related to the Ba-rich silicate melt that filled the intergranular space between the rock-forming minerals. Copyright © The Author(s), 2022. Published by Cambridge University Press on behalf of The Mineralogical Society of Great Britain and Ireland.},

note = {5},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85141313537,

title = {Crystal chemistry and Raman spectroscopy study of bennesherite, Ba2Fe2+Si2O7, and rare accessory Ba minerals from Caspar quarry, Bellerberg volcano, Germany},

author = { R. Juroszek and B. Ternes},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85141313537&doi=10.1180%2fmgm.2022.62&partnerID=40&md5=98c2bbefc93ad3ba6ae348aedf535e40},

doi = {10.1180/mgm.2022.62},

issn = {0026461X},

year  = {2022},

date = {2022-01-01},

journal = {Mineralogical Magazine},

volume = {86},

number = {5},

pages = {777-791},

publisher = {Cambridge University Press},

abstract = {Barium melilite - bennesherite, Ba2Fe2+Si2O7, known only from pyrometamorphic rocks of the Hatrurim Complex in Israel, has been recognised in a carbonate-silicate xenolith from the Bellerberg volcano area in Germany. The empirical formula of the German specimen is as follows: (Ba1.32Ca0.43Sr0.23Na0.05K0.02)Σ2.05(Fe2+0.79Ti0.06Mg0.05Al0.04Mn0.03Zn0.01)Σ0.98Si1.97O7. The Raman spectrum of bennesherite exhibits the presence of the main vibrations related to Fe2+O4 tetrahedra and disilicate Si2O7 groups at the T1 and T2 sites, at 589 cm-1 and in the range 618-673 cm-1, respectively. Detailed spectroscopic analyses performed for bennesherite in two different and random orientations confirm the reduction of bands intensity and the number of some components in several spectral ranges. Moreover, the presence of a heavy Ba atom indicates a decrease in band frequencies compared to melilites with Ca at the X position. A single-crystal X-ray diffraction experiment, despite attempts, could not be carried out due to the poor quality and small size of the bennesherite crystals however, a combination of composition and Raman data allowed for accurate phase identification. Detailed mineralogical investigations distinguished rare Ba minerals in association with bennesherite, such as walstromite, fresnoite and celsian, along with various ferrous melilites. Some of the detected phases are described from xenoliths of the Bellerberg volcano for the first time. The uniqueness of the Bellerberg volcano mineralisation is reflected in the interaction of alkaline magma with xenoliths of different compositions, which suggests that this locality still deserves attention as a source of new and unique minerals. Copyright © The Author(s), 2022. Published by Cambridge University Press on behalf of The Mineralogical Society of Great Britain and Ireland.},

note = {9},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85118206845,

title = {Luminescence properties of tetrahedral coordinated mn2+; genthelvite and willemite examples},

author = { M.B. Czaja and R. Lisiecki and R. Juroszek and T. Krzykawski},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85118206845&doi=10.3390%2fmin11111215&partnerID=40&md5=051fcc57b4ba4164f67dc932f01c9e08},

doi = {10.3390/min11111215},

issn = {2075163X},

year  = {2021},

date = {2021-01-01},

journal = {Minerals},

volume = {11},

number = {11},

publisher = {MDPI},

abstract = {The cause of the split of4A4E(4G) Mn2+ excited level measured on minerals spectra is discussed. It is our view that ∆E = |4E(4G) − 4A(4G)| should be considered an important spectroscopic parameter. Among the possible reasons for the energy levels splitting taken under consideration, such as the covalent bond theory, the geometric deformation of the coordination polyhedron and the lattice site’s symmetry, the first one was found to be inappropriate. Two studied willemite samples showed that the impurities occur in one of the two available lattice sites differently in both crystals. Moreover, it was revealed that the calculated crystal field Dq parameter can indicate which of the two non-equivalent lattice sites positions in the willemite crystal structure was occupied by Mn2+ . The above conclusions were confirmed by X-ray structure measurements. Significant differences were also noted in the Raman spectra of these willemites. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.},

note = {14},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85082124907,

title = {Siwaqaite, Ca6Al2(CrO4)3(OH)12·26H2O, a new mineral of the ettringite group from the pyrometamorphic Daba-Siwaqa complex, Jordan},

author = { R. Juroszek and B. Krüger and I.O. Galuskina and H. Krüger and Y. Vapnik and E.V. Galuskin},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85082124907&doi=10.2138%2fam-2020-7208&partnerID=40&md5=8eaaaf63307e2db94ba7ba992640ae88},

doi = {10.2138/am-2020-7208},

issn = {0003004X},

year  = {2020},

date = {2020-01-01},

journal = {American Mineralogist},

volume = {105},

number = {3},

pages = {409-421},

publisher = {De Gruyter Open Ltd},

abstract = {A new mineral, siwaqaite, ideally Ca6Al2(CrO4)3(OH)12·26H2O [P31c; Z = 2; a = 11.3640(2) Å; c = 21.4485(2) Å; V = 2398.78(9) Å3], a member of the ettringite group, was discovered in thin veins and small cavities within the spurrite marble at the North Siwaqa complex, Lisdan-Siwaqa Fault, Hashem region, Jordan. This complex belongs to the widespread pyrometamorphic rock of the Hatrurim Complex. The spurrite marble is mainly composed of calcite, fluorapatite, and brownmillerite. Siwaqaite occurs with calcite and minerals of the baryte-hashemite series. It forms hexagonal prismatic crystals up to 250 μm in size, but most common are grain aggregates. Siwaqaite exhibits a canary yellow color and a yellowish-gray streak. The mineral is transparent and has a vitreous luster. It shows perfect cleavage on (1010). Parting or twinning is not observed. The calculated density of siwaqaite is 1.819 g/cm3. Siwaqaite is optically uniaxial (-) with ω = 1.512(2), ϵ = 1.502(2) (589 nm), and non-pleochroic. The empirical formula of the holotype siwaqaite calculated on the basis of 8 framework cations and 26 water molecules is Ca6.01(Al1.87Si0.12)S1.99[(CrO4)1.71(SO4)1.13(SeO4)0.40]S3.24(OH)11.63·26H2O. Xâ'ray diffraction (XRD), Raman, and infrared spectroscopy confirm the presence of OH- groups and H2O molecules and absence of (CO3)2- groups. The crystal structure of this Cr6+-analog of ettringite was solved by direct methods using single-crystal synchrotron XRD data. The structure was refined to an agreement index R1 = 4.54%. The crystal structure of siwaqaite consists of {Ca6[Al(OH)6]2·24H2O}6+ columns with the inter-column space (channels) occupied by (CrO4)2-, (SO4)2-, (SeO4)2-, and (SO3)2- groups and H2O molecules. The tetrahedrally coordinated site occupied by different anion groups is subjected to disordering and rotation of these tetrahedra within the structure. The temperature of siwaqaite formation is not higher than ~70-80 °C, as is evident from the mineral association and as inferred from the formation conditions of the natural and synthetic members of the ettringite group minerals, which are stable at conditions of T < 120 °C and pH = 9.5-13. The name siwaqaite is derived from the name of the holotype locality-Siwaqa area, where the mineral was found. © 2020 Walter de Gruyter GmbH, Berlin/Boston 2020.},

note = {18},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85075369797,

title = {Spectroscopic and structural investigations of blue afwillite from Ma'ale Adummim locality, Palestinian Autonomy},

author = { R. Juroszek and M.B. Czaja and R. Lisiecki and B. Krüger and B. Hachuła and I.O. Galuskina},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85075369797&doi=10.1016%2fj.saa.2019.117688&partnerID=40&md5=2c3ff99db7dd40a08668646c52454be7},

doi = {10.1016/j.saa.2019.117688},

issn = {13861425},

year  = {2020},

date = {2020-01-01},

journal = {Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy},

volume = {227},

publisher = {Elsevier B.V.},

abstract = {Until now, only the colourless crystals of mineral afwillite, Ca3(HSiO4)2·2H2O, were known from several localities around the world. Present work focuses on blue afwillite counterparts from the Ma'ale Adummim locality in Palestine. Using the wide spectrum of analytical methods we attempted to identify the causes of this unusual colour. Structural investigation confirms the presence of two tetrahedral SiO3OH units connected by hydrogen bonds. The Raman spectrum of afwillite, obtained for the first time, shows the increased number of bands in the range of 785-970 cm-1, whose assignation was correlated with the presence of two different kinds of structural units: (SiO3OH)3- and its deprotonated counterpart (SiO4)4-. The heating process at 250 °C, in addition to the colour changes from blue to pastel green, shows the intensity reduction and disappearing of some Raman bands attributed mainly to SiO3OH units. The IR investigation confirms also the presence of that unit and provides information that the position and designation of infrared bands above ∼2300 cm-1 is related to the strength of hydrogen bonds within the structure. The stretching and bending OH vibrations of afwillite sample show the partial shift to the lower spectral frequencies after the H/D isotopic exchange in OH or H2O groups. Based on the results of the electron absorption and luminescence analyses it has been proposed that the blue colour of afwillite is caused by hole oxygen defect, most probably SiO3 -. © 2019 The Authors},

note = {11},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85077313258,

title = {Raman spectroscopy and single-crystal high-temperature investigations of bentorite, Ca6Cr2(SO4)3(OH)12∙26H2O},

author = { R. Juroszek and B. Krüger and I.O. Galuskina and H. Krüger and M. Tribus and C. Kürsten},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85077313258&doi=10.3390%2fmin10010038&partnerID=40&md5=bea56d2eb5774d9faf155d3aa72fa81b},

doi = {10.3390/min10010038},

issn = {2075163X},

year  = {2020},

date = {2020-01-01},

journal = {Minerals},

volume = {10},

number = {1},

publisher = {MDPI AG},

abstract = {The crystal structure of bentorite, ideally Ca6Cr2(SO4)3(OH)12·26H2O, a Cr3+ analogue of ettringite, is for the first time investigated using X-ray single crystal diffraction. Bentorite crystals of suitable quality were found in the Arad Stone Quarry within the pyrometamorphic rock of the Hatrurim Complex (Mottled Zone). The preliminary semi-quantitative data on the bentorite composition obtained by SEM-EDS show that the average Cr/(Cr + Al) ratio of this sample is >0.8. Bentorite crystallizes in space group P31c, with a = b = 11.1927(5) Å},

note = {7},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85050799452,

title = {Raman spectroscopy and structural study of baryte-hashemite solid solution from pyrometamorphic rocks of the Hatrurim Complex, Israel},

author = { R. Juroszek and B. Krüger and K. Banasik and Y. Vapnik and I.O. Galuskina},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85050799452&doi=10.1016%2fj.saa.2018.07.079&partnerID=40&md5=c839adcfec2183101da26522457a5f87},

doi = {10.1016/j.saa.2018.07.079},

issn = {13861425},

year  = {2018},

date = {2018-01-01},

journal = {Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy},

volume = {205},

pages = {582-592},

publisher = {Elsevier B.V.},

abstract = {A number of the baryte, BaSO4, - hashemite, BaCrO4, solid solution compounds were synthesized previously. In this study, Raman spectra of naturally occurring phases belonging to the baryte-hashemite series from the pyrometamorphic rocks of the Hatrurim Complex were investigated. The Raman spectrum of natural hashemite, obtained for the first time, shows the position of the fundamental bands for the chromate anion vibrations. The bands related to the stretching vibrations (ν1; ν3) occur at 864 cm−1 and in 871–909 cm−1 regions, whereas the bending vibrations (ν2; ν4) are visible in the 346–360 cm−1 and 400–422 cm−1 range, respectively. Received results allowed to observe a gradual shift of bands in baryte-hashemite solid solution as a consequence of the substitution by different cations. The position of bands depends on the Cr/S ratio in analysed samples, and it is determined by differences in atomic mass, and ionic radii between Cr6+ and S6+, which affect changes in the strength and length of bonds. The occupancy of the same atomic position by two different cations enables to notice variations of polyhedra geometry, and unit cell parameters despite that baryte and hashemite are isostructural and crystallize in the same Pnma space group. We also confirm that the immobilization of the toxic (CrO4)2− ion in the baryte structure may occur directly without oxygen state reduction, we propose to using a baryte-hashemite solid solution as a reservoir for the incorporation of Cr as an environmental pollutant. © 2018 Elsevier B.V.},

note = {13},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85050662575,

title = {Sharyginite, Ca3TiFe2O8a new mineral from the bellerberg Volcano, Germany},

author = { R. Juroszek and H. Krüger and I.O. Galuskina and B. Krüger and L. Jeżak and B. Ternes and J.A. Wojdyla and T. Krzykawski and L. Pautov and E.V. Galuskin},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85050662575&doi=10.3390%2fmin8070308&partnerID=40&md5=a1c916dfc17bce40bb8cf7d0ecd7ce34},

doi = {10.3390/min8070308},

issn = {2075163X},

year  = {2018},

date = {2018-01-01},

journal = {Minerals},

volume = {8},

number = {7},

publisher = {MDPI AG},

abstract = {The new mineral sharyginite, Ca3TiFe2O8(P21ma; Z = 2; a = 5.423(2) Å; b = 11.150(8) Å; c = 5.528(2) Å; V = 334.3(3) Å3), a member of the anion deficient perovskite group, was discovered in metacarbonate xenoliths in alkali basalt from the Caspar quarry, Bellerberg volcano, Eifel, Germany. In the holotype specimen, sharyginite is widespread in the contact zone of xenolith with alkali basalt. Sharyginite is associated with fluorellestadite, cuspidine, brownmillerite, rondorfite, larnite and minerals of the chlormayenite-wadalite series. The mineral usually forms flat crystals up to 100 µm in length, which are formed by pinacoids {100}, {010} and {001}. Crystals are flattened on (010). Sharyginite is dark brown, opaque with a brown streak and has a sub-metallic lustre. In reflected light, it is light grey and exhibits rare yellowish-brown internal reflections. The calculated density of sharyginite is 3.943 g·cm-3. The empirical formula calculated on the basis of 8 O apfu is Ca3.00(Fe3+ 1.00Ti4+ 0.86Mn4+ 0.11Zr0.01Cr3+ 0.01Mg0.01)Σ2(Fe3+ 0.76Al0.20Si0.04)Σ1.00O8. The crystal structure of sharyginite, closely related to shulamitite Ca3TiFeAlO8structure, consists of double layers of corner-sharing (Ti; Fe3+) O6octahedra, which are separated by single layers of (Fe3+O4) tetrahedra. We suggest that sharyginite formed after perovskite at high-temperature conditions >1000°C. © 2018 by the authors. Licensee MDPI, Basel, Switzerland.},

note = {12},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85053478220,

title = {New occurrence of rusinovite, Ca10(Si2O7)3Cl2: Composition, structure and Raman data of rusinovite from Shadil-Khokh volcano, South Ossetia and Bellerberg Volcano, Germany},

author = { D. Środek and R. Juroszek and H. Krüger and B. Krüger and I.O. Galuskina and V.M. Gazeev},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85053478220&doi=10.3390%2fmin8090399&partnerID=40&md5=b666eb74974531822c25e1da70d13cf5},

doi = {10.3390/min8090399},

issn = {2075163X},

year  = {2018},

date = {2018-01-01},

journal = {Minerals},

volume = {8},

number = {9},

publisher = {MDPI AG},

abstract = {Rusinovite, Ca10(Si2O7)3Cl2, was found at two new localities, including Shadil-Khokh volcano, South Ossetia and Bellerberg volcano, Caspar quarry, Germany. At both of these localities, rusinovite occurs in altered carbonate-silicate xenoliths embedded in volcanic rocks. The occurrence of this mineral is connected to specific zones of the xenolith characterized by a defined Ca:Si < 2 ratio. Chemical compositions, as well as the Raman spectra of the investigated rusinovite samples, correspond to the data from the locality of rusinovite holotype—Upper Chegem Caldera, Northern Caucasus, Russia. The most intense bands of the Raman spectra are related to vibrations of (Si2O7) groups. Unit cell parameters of rusinovite from South Ossetia are: a = 3.76330(4) Å},

note = {6},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85030160053,

title = {Dzierżanowskite, CaCu2S2 - A new natural thiocuprate from Jabel Harmun, Judean Desert, Palestine Autonomy, Israel},

author = { I.O. Galuskina and E.V. Galuskin and K. Prusik and Y. Vapnik and R. Juroszek and L. Jeżak and M.N. Murashko},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85030160053&doi=10.1180%2fminmag.2016.080.153&partnerID=40&md5=82a478e87e7cece2dbdd52ce06816d74},

doi = {10.1180/minmag.2016.080.153},

issn = {0026461X},

year  = {2017},

date = {2017-01-01},

journal = {Mineralogical Magazine},

volume = {81},

number = {5},

pages = {1073-1085},

publisher = {Mineralogical Society},

abstract = {Dzierżanowskite, CaCu2S2 (P3m1; a = 3.9400(4); c = 6.523(1) Å; V = 87.69(2) Å3; Z = 1), belonging to the thiocuprates,was found in larnite pseudoconglomerate rocks of the Hatrurim pyrometamorphic Complex on Jabel Harmun locality, Palestinian Autonomy, Israel. Dzierżanowskite occurrs in larnite pebbles, which are embedded into low-temperature mineral matrix. Associated minerals are larnite, brownmillerite, fluorellestadite, ye'elimite, gehlenite,periclase, ternesite, nabimusaite, vorlanite, vapnikite, fluor mayenite, fluorkyuygenite, oldhamite, jasmundite, covellite, chalcocite and pyrrhotite. Electron microprobe analyses yield an average composition of Cu 55.25, Fe 0.13, S 27.46 and Ca 16.99 wt.%, total 99.83%. The empirical formula of dzierżanowskite, based on 5 atoms, is estimated as Ca0.98Cu2.02Fe0.01S1.99. Dzierżanowskite forms grains up to 15 μm in size or rims on oldhamite and laminar intergrowths with chalcocite and covellite. Dzierżanowskite is characterized by a dark orange color, a cream streak and submetallic luster. In reflected light it is grey, with a cream tint and characteristic yellow-orange internal reflections. The calculated density of dzierżanowskite is 4.391 g cm-3. Three bands at 300, 103 and 86 cm-1 are observed in the Raman spectrum of dzierżanowskite. The strongest lines of the calculated powder diffraction pattern are [d; Å (I) hkl]: 2.358(100) 102, 1.970(93)110, 3.023(78) 011, 6.523(36) 001, 3.412(28) 100, 1.834(28) 103. Dzierżanowskite was also found in unusual jasmindite rocks, forming small "paleofumaroles" within areas of low-temperature hydrothermal rocks bearing larnite pseudoconglomerates at Jabel Harmun. Dzierżanowskite is a superimposed phase of the high temperature alteration of pyrometamorphic rocks, which were subjected to by-products (melts/fluids and gases) of pyrometamorphism originating in the deeper levels of combustion. © 2017 The Mineralogical Society.},

note = {14},

keywords = {},

pubstate = {published},

tppubtype = {article}

}