Uranová supergenní mineralizace s fosfuranylitem z Abertam, Krušné hory (Česká republika).
In: Bulletin Mineralogicko-Petrologickeho Oddeleni Narodniho Muzea v Praze, Jg. 24 (2016), Heft 1, S. 46-55
Online
academicJournal
Zugriff:
An uranium supergene mineralization (phosphuranylite, metatorbernite, metaautunite) was found in the dump material of the historical mine at the Graf Mauritius vein near Abertamy (Krušné hory Mountains, Czech Republic). Phosphuranylite occurs there as yellow aggregates up to several cm in size composed by tiny tabular crystals (0.1 - 0.2 mm). It is orthorhombic, space group Cmcm, the unit-cell parameters refined from X-ray powder diffraction data are: a 15.893(6), b 13.738(5), c 17.302(7) Å, V 3777.6(4) ų. Chemical analyses of phosphuranylite correspond to the empirical formula K1.01Ca0.99Pb0.08Al0.06Co0.05Ni0.02Mn0.02Zn0.01 (H3O)2.49(UO2)6.98O4[(PO4)3.95(AsO4)0.05]Σ4.00·8H2O. Metaautunite forms light greenish yellow tabular crystals up to 1 mm in size. It is tetragonal, space group P 4/n, the unit-cell parameters refined from X-ray powder diffraction data are: a 6.969(4), c 16.8885(2) Å and V 820.3(5) ų. Chemical analyses of metaautunite correspond to the empirical formula (Ca0.89Cu0.05Co0.02Fe0.01Ba0.01)Σ0.98(UO2)1.96[(PO4)1.93(AsO4)0.07]Σ2.00·6H2O. Metatorbernite forms green crystalline coatings composed of tabular, and more rarely pyramidal crystals up to 1 mm in size. It is tetragonal, space group P 4/n, the unit-cell parameters refined from X-ray powder diffraction data are: a 6.973(2), c 17.3263(2) Å and V 842.5(3) ų. Chemical analyses of metatorbernite correspond to the empirical formula (Cu0.93Ca0.01Zn0.01Fe0.01)Σ0.96(UO2)1.98 [(PO4)1.89(AsO4)0.10(VO4)0.01]Σ2.00·8H2O. The origin of studied mineral association is interpreted as a product of in-situ supergene alteration of primary uranium mineralization in the environment localized nearby the present surface. [ABSTRACT FROM AUTHOR]
Titel: |
Uranová supergenní mineralizace s fosfuranylitem z Abertam, Krušné hory (Česká republika).
|
---|---|
Autor/in / Beteiligte Person: | PAULIŠ, PETR ; SEJKORA, JIŘÍ ; URBAN, MICHAL ; NESRSTA, MAREK ; VRTIŠKA, LUBOŠ ; MALÍKOVÁ, RADANA ; POUR, ONDŘEJ ; LAUFEK, FRANTIŠEK |
Link: | |
Zeitschrift: | Bulletin Mineralogicko-Petrologickeho Oddeleni Narodniho Muzea v Praze, Jg. 24 (2016), Heft 1, S. 46-55 |
Veröffentlichung: | 2016 |
Medientyp: | academicJournal |
ISSN: | 1211-0329 (print) |
Sonstiges: |
|