@article{2-s2.0-85178322346,

title = {57Fe Mössbauer Spectroscopy and X-ray Diffraction of Annealed Highly Metamict Perrierite: Activation Energy and Recrystallization Processes},

author = { D. Malczewski and A. Grabias and M. Dziurowicz and T. Krzykawski},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85178322346&doi=10.3390%2fmin13111395&partnerID=40&md5=64240a6ebfc4e1e6d17bbb64667763b0},

doi = {10.3390/min13111395},

issn = {2075163X},

year  = {2023},

date = {2023-01-01},

journal = {Minerals},

volume = {13},

number = {11},

publisher = {Multidisciplinary Digital Publishing Institute (MDPI)},

abstract = {This paper presents the results of 57Fe Mössbauer spectroscopy and X-ray diffraction analysis of highly metamict perrierite (REE;Ca;Th)4(Fe2+;Mg)2(Ti;Fe3+)3Si4O22 after annealing in argon from 673 to 1273 K for one hour. Radioactive elements in metamict minerals damage crystal structure on geologic time scales primarily due to recoil nuclei from α-decay of 238U, 232Th, 235U, and their daughter products. Metamict minerals are widely used in geochronology and can serve as natural analogs for the study of radiation effects in high-level nuclear waste. Analyses were performed on fragments of a perrierite sample collected from granitoids near Amherst, Virginia (USA). Electron microprobe and gamma-ray spectrometry recorded Fe concentrations of 4.7 wt.% and Th and U concentrations of 0.64 and 0.06 wt.%, respectively. The calculated total absorbed α-dose was 7.8 × 1015 α-decay mg−1. The Mössbauer spectrum of the untreated sample can be fitted to two Fe2+ and two Fe3+ doublets in octahedral coordination with a relative ΣFe2+/ΣFe of 0.63. For samples annealed at 1173 K and 1273 K, spectra show a decrease in the total contribution of Fe2+ to 0.58 due to dehydroxylation associated with the simultaneous oxidation of post-metamict Fe2+ to Fe3+. In the examined perrierite, Fe2+ occurs in structural positions B and C(1). The broad, predominant Fe3+ doublet observed in the spectrum of the unannealed sample splits into two components at 973 K interpreted to represented positions C(1) and C(2) in the perrierite structure. The Mössbauer spectra show a prominent decrease in the width of the high-energy absorption peak representing Fe2+ components with increasing temperature. The variation in the width of this peak versus the annealing temperature seems to be an indicator of thermally induced recrystallization. Based on the exponential dependence of the derivative function of the parameter with the inverse temperature and using an Arrhenius plot, an activation energy (EA) of 0.73 eV was determined for thermally-induced recrystallization. Corresponding XRD data show progressive recrystallization with increasing annealing temperature. The XRD pattern of the fragment annealed at 1273 K indicates that highly metamict perrierite recrystallized to the pre-metamict state that can be indexed to the C2/m space group. © 2023 by the authors.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85162787256,

title = {Natural radioactivity in select metamorphic and sedimentary rocks of the Opava Mountains (Poland): A comparison between laboratory and in situ measurements of232 Th,238 U, and40 K activities},

author = { A. Moska and D. Malczewski and J. Żaba and M. Dziurowicz},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85162787256&doi=10.46544%2fAMS.v28i1.20&partnerID=40&md5=055d6534201540064fa4c2760136b52f},

doi = {10.46544/AMS.v28i1.20},

issn = {13351788},

year  = {2023},

date = {2023-01-01},

journal = {Acta Montanistica Slovaca},

volume = {28},

number = {1},

pages = {250-262},

publisher = {Technical University of Kosice},

abstract = {This paper reports the natural radioactivities of eight characteristic rocks from the Opava Mountains region (Eastern Sudetes; Poland) as measured in the laboratory and under in situ field conditions. Activity concentrations for232 Th,238 U, and40 K were obtained using an HPGe gamma-ray spectrometry system. Activities for232 Th ranged from 2 to 39 Bq kg−1 as measured in the laboratory and from 5 to 38 Bq kg−1 measured under in situ field conditions. For238 U, the activity concentrations ranged from 4 to 37 Bq kg−1 in the laboratory and from 7 to 42 Bq kg−1 under in situ field conditions. For40 K, activity concentrations ranged from 12 to 820 Bq kg−1 in the laboratory and from 60 to 826 Bq kg−1 under in situ field conditions. Measured activity concentrations were compared with average activity concentrations of radionuclides in similar types of rocks from different global localities. The in situ field measurement and laboratory measurements did not show significant differences indicating that both methods provide reliable232 Th,238 U, and40K results for different lithologies. © 2023 by the authors.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85125539700,

title = {High concentrations of HgS, MeHg and toxic gas emissions in thermally affected waste dumps from hard coal mining in Poland},

author = { Á. Nádudvari and J. Cabała and L. Marynowski and M. Jabłońska and M. Dziurowicz and D. Malczewski and B. Kozielska and P. Siupka and Z. Piotrowska-Seget and B.R.T. Simoneit and M. Szczyrba},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85125539700&doi=10.1016%2fj.jhazmat.2022.128542&partnerID=40&md5=dc4d622cf940b6c3ae23b6a2bebc9f65},

doi = {10.1016/j.jhazmat.2022.128542},

issn = {03043894},

year  = {2022},

date = {2022-01-01},

journal = {Journal of Hazardous Materials},

volume = {431},

publisher = {Elsevier B.V.},

abstract = {This study aims to provide numerous environmental research approaches to understand the formation of mineral and organic mercury compounds in self-heating coal waste dumps of the Upper Silesian Coal Basin (USCB). The results are combined with environmental and health risk assessments. The mineralogy comprised accessory minerals in the fine fraction of thermally affected waste, i.e., Hg sulfides, most likely cinnabar or metacinnabar. Moreover, other metals, e.g., Pb, Zn and Cu, were found as sulfide forms. Apart from Hg, the ICP-ES/MS data confirmed the high content of Mn, Zn, Pb, Hg, Cr and Ba in these wastes. The high concentration of available Hg resulted in elevated MeHg concentrations in the dumps. There were no correlations or trends between MeHg concentrations and elemental Hg, TS, TOC, and pH. Furthermore, we did not detect microbial genes responsible for Hg methylation. The organic compounds identified in waste and emitted gases, such as organic acids, or free methyl radicals, common in such burn environments, could be responsible for the formation of MeHg. The concentration levels of gases, e.g., benzene, formaldehyde, NH3, emitted by the vents, reached or surpassed acceptable levels numerous times. The potential ecological and human health risks of these dumps were moderate to very high due to the significant influence of the high Hg concentrations. © 2022 Elsevier B.V.},

note = {4},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85138803910,

title = {NATURAL RADIOACTIVITY IN SELECT SERPENTINITE-RELATED NEPHRITE SAMPLES: A COMPARISON WITH DOLOMITE-RELATED NEPHRITE},

author = { D. Malczewski and M. Sachanbiński and M. Dziurowicz},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85138803910&doi=10.5741%2fGEMS.58.2.196&partnerID=40&md5=bd774ac01d9a6c6adfeecf7701a1a5c5},

doi = {10.5741/GEMS.58.2.196},

issn = {0016626X},

year  = {2022},

date = {2022-01-01},

journal = {Gems and Gemology},

volume = {58},

number = {2},

pages = {196-213},

publisher = {Gemological Institute of America (GIA)},

abstract = {The published literature offers only a few records of direct measurement of the natural radioactivity in nephrite. The present study used high-purity germanium (HPGe) low-background gamma-ray spectrometry to measure activity concentrations of primordial radionuclides in 11 serpentinite-related nephrite (ortho-nephrite) samples from deposits in Poland, Russia, Canada, and New Zealand, along with three samples of rodingite and serpentinite from a nephrite deposit in Nasławice, Poland. All nephrite samples exhibited very low 40K, 232Th, and 238U activity concentrations that fell within the range of published values for ultrabasic and basic rocks. The nephrite samples from Jordanów (Poland) gave the highest uranium and thorium activity concentration values. Two samples of plagiogranitic rodingite showed significantly higher 238U and 232Th activity concentrations than the values measured for nephrite. Nephrite thorium and uranium concentrations correlated strongly (r = 0.98), and the corresponding Th/U ratios appear unique according to geographical location. The mean estimated potassium, thorium, and uranium concentrations from ortho-nephrite analyzed here were compared with corresponding mean values previously reported for dolomite-related nephrite (para-nephrite). The comparison indicates that the ortho-nephrites studied have similar uranium concentrations but lower mean potassium concentrations and higher mean thorium concentrations than those reported for para-nephrite in the literature. © 2022 Gemological Institute of America.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85115198250,

title = {Natural radioactivity of rocks from the historic Jeroným Mine in the Czech Republic},

author = { D. Malczewski and M. Dziurowicz and Z. Kalab and M. Rösnerová},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85115198250&doi=10.1007%2fs12665-021-09944-5&partnerID=40&md5=bee0fed3a5d8e46b692d1c52993ea20b},

doi = {10.1007/s12665-021-09944-5},

issn = {18666280},

year  = {2021},

date = {2021-01-01},

journal = {Environmental Earth Sciences},

volume = {80},

number = {18},

publisher = {Springer Science and Business Media Deutschland GmbH},

abstract = {This study reports the natural radioactivity of characteristic rocks found in the historic Jeroným Mine of the Czech Republic as measured under the laboratory conditions. The rocks analyzed included granites and schists weathered to varying degrees and collected from different levels of the underground workings of the Jeroným Mine. The mine itself has been subject to metal extraction (mainly tin and tungsten) since the sixteenth century and has recently been developed as a cultural and scientific attraction open to the public. Activity concentrations of 40K, 232Th and 238U were measured from nine rock samples using gamma-ray spectrometry. The activity concentrations of 40K varied from 595 Bq kg−1 to 1244 Bq kg−1, while 232Th varied from 25 Bq kg−1 to 55 Bq kg−1. The activities associated with 238U ranged from 46 Bq kg−1 to 386 Bq kg−1. The measured activities were used to estimate two radiation hazard indices typically applied to building materials, the activity concentration index I and the external hazard index Hex. Mean respective values of 1.02 and 0.77 for I and Hex indicate that the rocks found in the Jeroným Mine meet radiological safety standards for building materials and do not pose a risk to potential tourists and staff. © 2021, The Author(s).},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85084762299,

title = {222Rn and 220Rn emanations from powdered samples of samarskite as a function of annealing temperature},

author = { D. Malczewski and M. Dziurowicz},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85084762299&doi=10.2138%2fam-2020-6988&partnerID=40&md5=085643ab3f2ad670ca23953681a36e99},

doi = {10.2138/am-2020-6988},

issn = {0003004X},

year  = {2020},

date = {2020-01-01},

journal = {American Mineralogist},

volume = {105},

number = {5},

pages = {708-715},

publisher = {De Gruyter Open Ltd},

abstract = {Emanation coefficients for radon (222Rn) and thoron (220Rn) were measured from fully metamict samarskite collected from Centennial Cone after 1 h and 24 h annealing in argon from 473 to 1373 K. For the 1 h annealing run, 222Rn emanation coefficients ranged from 5 × 10-6 to 2.1 × 10-5 %, while 220Rn coefficients varied from 6.3 × 10-3 to 2 × 10-2 %. For the 24 h annealing run, 222Rn coefficients ranged from 5.8 × 10-6 to 2.3 × 10-5 %, while 220Rn coefficients varied from 4.1 × 10-3 to 1.5 × 10-2 %. The 222Rn and 220Rn emanation coefficients vs. annealing temperature data can be described by an exponentially decreasing sinusoidal function. Both 222Rn and 220Rn emanation coefficient values after annealing considerably exceeded those measured from an unheated powder reference sample and from the original samarskite sample. © 2020 Walter de Gruyter GmbH, Berlin/Boston 2020.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85083340200,

title = {Activation energy of annealed, partially metamict davidite by57Fe mössbauer spectroscopy},

author = { D. Malczewski and A. Grabias and M. Dziurowicz},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85083340200&doi=10.3190%2fjgeosci.298&partnerID=40&md5=adf2abef0c6728d3707ec1a8fe84d1fe},

doi = {10.3190/jgeosci.298},

issn = {18026222},

year  = {2020},

date = {2020-01-01},

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

volume = {65},

number = {1},

pages = {37-44},

publisher = {Czech Geological Survey},

abstract = {This study used57Fe Mössbauer spectroscopy to determine the activation energy for thermal recrystallization of partially metamict davidite [multiple oxide; (La;Ce;Ca;Th)(Y;U)(Ti;Fe3+)20O38]. Radioactive elements in metamict minerals damage crystal structure primarily due to recoil nuclei from α-decay of238U,232Th,235U, and their daughter products. Metamict minerals are widely used in geochronology and can serve as natural analogues for the study of radiation effects in high-level nuclear waste. Analysis was performed on fragments of a davidite sample collected from the Bektau-Ata alkaline granitoid massif (Kazakhstan). Electron-microprobe analysis showed that the sample may be classified as a davidite-(La) due to its La concentration of 3.14 wt. %, relatively low U of 0.88 wt. %, and Th of 0.25 wt. %. The calculated total absorbed α-dose was 8.1 × 1015 α-decay mg–1. The concentration of Fe was 15 wt. % (2.1 % Fe2+ and 12.9 % Fe3+).57Fe Mössbauer spectroscopy was carried out on fragments of the davidite sample after one-hour annealing under an argon atmosphere from 673 to 1373 K. A Fe2+ component was observed up to 1173 K. Variation in the ratio of amplitudes for the main absorption peaks in the Mössbauer spectra vs. annealing temperature appeared to be a sensitive indicator of thermally-induced recrystallization. The activation energy},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85055793451,

title = {Spectroscopic characterization and thermal recrystallization study of an unknown Metamict phase from Tuften quarry, southern Norway},

author = { D. Malczewski and M. Dziurowicz and T. Krzykawski and A. Grabias},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85055793451&doi=10.3749%2fcanmin.1800015&partnerID=40&md5=c9c0f7c24799e3a2150d50de2bb00284},

doi = {10.3749/canmin.1800015},

issn = {00084476},

year  = {2018},

date = {2018-01-01},

journal = {Canadian Mineralogist},

volume = {56},

number = {4},

pages = {365-373},

publisher = {Mineralogical Association of Canada},

abstract = {This paper presents the results of 57Fe Mössbauer spectroscopy, SEM-EDS analysis, gamma-ray spectrometry, and X-ray diffraction (XRD) patterns for an unknown metamict phase (UMP) from a syenite pegmatite at Tuften quarry, southern Norway. The sample exhibits232Th and238U activities of 137 and 2.6 Bq g-1, respectively, and a calculated total absorbed a-dose of 83 1015 a-decay mg-1. Its chemical composition falls generally between chevkinite-(Ce)-perrierite-(Ce) and allanite-(Ce)- ferriallanite-(Ce) mineral compositions. The Mössbauer spectrum of an untreated UMP sample can be fitted to two Fe2+ and Fe3+ quadrupole doublets assigned to octahedral coordination with a relative Fe2+/RFe ratio of 0.11. A sample of the UMP was also annealed in argon for one hour at 1273 K. Powder of the completely recrystallized sample was subjected to XRD analysis and indexed to the P121 space group with unit-cell dimensions of a 8.179 A , b 14.16 A , c 4.291 A , and β = 96.718. The corresponding Mössbauer spectrum is characterized by the presence of three quadrupole doublets also assigned to Fe2+ and Fe3+ in octahedral coordination with a relative Fe2+/RFe ratio of 0.15. One of the Fe3+ doublets shows extremely high quadrupole splitting of 2.60 mm s-1, implying extreme distortion of the coordination octahedra. © 2018 Mineralogical Association of Canada. All rights reserved.},

note = {2},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85055774475,

title = {222Rn and220Rn emanations from zircon crystals as a function of absorbed α-doses},

author = { D. Malczewski and M. Dziurowicz and T. Krzykawski and A. Stryjewski},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85055774475&doi=10.3749%2fcanmin.1700089&partnerID=40&md5=c577824078595f3ded83c851d1787065},

doi = {10.3749/canmin.1700089},

issn = {00084476},

year  = {2018},

date = {2018-01-01},

journal = {Canadian Mineralogist},

volume = {56},

number = {4},

pages = {451-462},

publisher = {Mineralogical Association of Canada},

abstract = {Zircon (ZrSiO4) contains small amounts of U and Th substituted for Zr in the crystal matrix. This can cause structural damage through progressive overlap of recoil nuclei collision cascading from α-decay of238U,232Th,235U, and their daughter products. Radioactivity can ultimately lead to metamictization and associated open-system behavior of parent-daughter radionuclides within the mineral. We measured222Rn and220Rn emanations, along with uranium and thorium concentrations, from 10 large zircon crystals of differing ages and from different global locations. The calculated total absorbed a-doses ranged from 1.631014 α-decay mg-1 (Seiland zircon) to 5.331015 α-decay mg-1 (Grass Lake zircon).222Rn emanation coefficients ranged from 10-4 % (Renfrew zircon) to 4310-2 % (Miask zircon), while220Rn emanation coefficients varied from 3310-4 % (Minas Gerais zircon) to 7 3 10-2 % (Miask zircon). Both222Rn and220Rn emanation coefficients observed in this study correlate strongly with the absorbed a-dose from the232Th decay series. Radon emanations, however, do not correlate with the total absorbed α-dose. © 2018 Mineralogical Association of Canada. All rights reserved.},

note = {2},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85042122357,

title = {Natural radioactivity in granites and gneisses of the Opava Mountains (Poland): a comparison between laboratory and in situ measurements},

author = { A. Dżaluk and D. Malczewski and J. Żaba and M. Dziurowicz},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85042122357&doi=10.1007%2fs10967-018-5726-3&partnerID=40&md5=0d872a25e4175f036f7d772a6241a515},

doi = {10.1007/s10967-018-5726-3},

issn = {02365731},

year  = {2018},

date = {2018-01-01},

journal = {Journal of Radioanalytical and Nuclear Chemistry},

volume = {316},

number = {1},

pages = {101-109},

publisher = {Springer Netherlands},

abstract = {The natural radioactivities of five characteristic igneous rocks of the eastern foreland of the Opava Mountains (Eastern Sudetes; Poland), obtained in the laboratory and under in situ conditions, are presented. The activity concentrations of 232Th, 238U, and 40K were measured using an HPGe gamma-ray spectrometry system. The ranges of the activity concentrations of 232Th were 7–71 Bq kg−1 in the laboratory and 6–68 Bq kg−1 for the in situ measurements. For 238U, the ranges of the activity concentrations were 5–52 Bq kg−1 in the laboratory and 9–48 Bq kg−1 for the in situ measurements, and for 40K, the ranges were 520–1560 Bq kg−1 in the laboratory and 537–1700 Bq kg−1 for the in situ measurements. These determined activity concentrations were compared with the average activity concentrations of the radionuclides in similar types of rocks and with data from the Sudetes available in the literature. No significant differences were found between the in situ and laboratory measurements. © 2018, The Author(s).},

note = {3},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85037718948,

title = {222Rn and 220Rn concentrations in selected soils developed on the igneous rocks of the kaczawa mountains (Sudetes, Poland)},

author = { M. Dziurowicz and D. Malczewski and J. Żaba},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85037718948&partnerID=40&md5=02f3f739500e9a3bef434fab9e4cadf8},

issn = {13351788},

year  = {2017},

date = {2017-01-01},

journal = {Acta Montanistica Slovaca},

volume = {22},

number = {3},

pages = {238-245},

publisher = {Technical University of Kosice},

abstract = {This study presents the preliminary results of 222Rn (radon) and 220Rn (thoron) concentrations that were measured in the soils developed on igneous rocks including mafic (pillow lavas; basalts and melaphyre) and acid (keratophyre; rhyolite and rhyolitic tuff) rocks at ten locations in the Kaczawa Mountains (SW Poland). The measurements were carried out at sampling depths of 10, 40 and 80 cm using a RAD7 portable radon system. The highest concentrations of radon (222Rn) were mainly observed in the soils overlaying acid igneous rocks. The highest value of 11 kBq m-3 was obtained at a depth of 10 cm for soils overlaying melaphyre. At depths of 40 and 80 cm, the averages of 222Rn concentrations showed the same values of 3.6 kBq m-3 for all of the soils investigated. The highest concentrations of thoron (220Rn) were observed in soils overlaying acid igneous rocks, i.e. the value of 49 kBq m-3 at a depth of 40 cm for soils overlaying rhyolitic tuff. In the soils developed on basalts, the average concentrations of 222Rn increased with the sampling depth, whereas the average concentrations of thoron (220Rn) decreased with increasing sampling depth. Positive correlations were found between 232Th activity in the parent rocks and soil gas 220Rn concentrations at all of the sampling depths, whereas a positive correlation between soil gas 222Rn and the 238U activity concentration in the parent rocks was only found at a depth of 40 cm. © 2017, Technical University of Kosice. All rights reserved.},

note = {1},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85023162016,

title = {Identification of iron-bearing minerals in basalts and pillow lavas of the Kaczawa Mountains using 57Fe Mössbauer spectroscopy},

author = { D. Malczewski and M. Jeleń and J. Żaba and A. Błachowski and K. Ruebenbauer and M. Dziurowicz},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85023162016&doi=10.1515%2fnuka-2017-0021&partnerID=40&md5=42e7327d7bb5b3c60c781860d4fc7d6c},

doi = {10.1515/nuka-2017-0021},

issn = {00295922},

year  = {2017},

date = {2017-01-01},

journal = {Nukleonika},

volume = {62},

number = {2},

pages = {145-148},

publisher = {Institute of Nuclear Chemistry and Technology},

abstract = {The Kaczawa Mountains along with the Kaczawa foothill comprise a complicated geological unit that is called the Kaczawa metamorphic (Sudetes; SW Poland). The aim of our work was to identify the iron-bearing minerals in samples of basalts and pillow lavas from the Kaczawa metamorphic using 57Fe Mössbauer spectroscopy. Based on the preliminary results, the Fe3+/Fe2+ ratio in the samples was determined. © 2017 Dariusz Malczewski et al.},

note = {2},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-84937799376,

title = {222Rn and 220Rn emanations as a function of the absorbed α-doses from select metamict minerals},

author = { D. Malczewski and M. Dziurowicz},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84937799376&doi=10.2138%2fam-2015-4917&partnerID=40&md5=902056db03e9859a44179a5bd173b575},

doi = {10.2138/am-2015-4917},

issn = {0003004X},

year  = {2015},

date = {2015-01-01},

journal = {American Mineralogist},

volume = {100},

number = {7},

pages = {1378-1385},

publisher = {Walter de Gruyter GmbH},

abstract = {Metamict minerals contain uranium and thorium, which contribute to physical degradation or metamictization of their crystal structures over geologic time. The damage occurs primarily through progressive overlapping recoil nuclei collision cascades from E-decay of 238U, 232Th, 235U, and their daughter products. We measured 222Rn and 220Rn emanations from metamict samples of nine oxides (brannerite; davidite; fergusonites; pyrochlores; samarskites; and uraninite), two phosphates (monazites), and eight silicates (cerite; gadolinites; perrierite; rinkite; thorite; turkestanite; and vesuvianite). The total absorbed a-doses ranged from 1.4 × 1015 to 6.1 × 1018 a-decay mg-1 for cerite and uraninite, respectively. The 222Rn emanation coefficients varied from 5 × 10-5% (uraninite) to 2.5% (turkestanite). The 220Rn emanation coefficients varied from 7 × 10-3% (gadolinite Ytterby) to 6.2% (gadolinite Marysin). The lowest 222Rn emanation coefficients occurred among metamict minerals containing the highest concentrations of 238U (i.e.; uraninite; samarskites; and brannerite). Overall, the 222Rn and 220Rn emanation coefficients observed in this study fall significantly below previously reported values. © 2015 by Walter de Gruyter Berlin/Boston.},

note = {18},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-84856736705,

title = {Frictional Metamorphism of Coal in the Upper Silesia Coal Basin, Southern Poland},

author = { S.R. Ćmiel and M. Dziurowicz},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84856736705&doi=10.1007%2f978-3-642-19097-1_13&partnerID=40&md5=1f021a9c5be3b9e658180b1930f6e2c7},

doi = {10.1007/978-3-642-19097-1_13},

issn = {21905193},

year  = {2011},

date = {2011-01-01},

journal = {GeoPlanet: Earth and Planetary Sciences},

volume = {3},

pages = {127-133},

abstract = {Measurements of parameters of coal in the fault zones of the Upper Silesia Coal Basin (USCB) revealed that ca. 12% of the examined samples showed aggrading changes of coal quality; ca. 30% of them showed degrading ones and 58% did not show any of these changes. The aggrading changes were observed only in the immediate vicinity of the slickenside at a maximum distance of 0.2 m. The noticeable changes were connected with the majority of the parameters tested. The mean values of the coefficient of variation for all of the tested parameters ranged from 1 to 100%; the average value was 16.6%, and changeability compared to the unchanged zone varied from 0 to 51.5%. These changes are connected with flexible faults whose run is close to N-S and W-E directions. © Springer-Verlag Berlin Heidelberg 2011.},

note = {3},

keywords = {},

pubstate = {published},

tppubtype = {article}

}