Dewindtit z uranového ložiska Zálesí u Javorníka v Rychlebských horách (Česká republika).
In: Bulletin Mineralogicko-Petrologickeho Oddeleni Narodniho Muzea v Praze, Jg. 24 (2016), Heft 1, S. 63-69
Online
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Zugriff:
A rare hydrated lead uranyl phosphate, mineral dewindtite, was found in the mine dump material of the abandoned uranium deposit Zálesí, Rychlebské hory Mountains, Silesia, Czech Republic. Dewindtite occurs there as lemon yellow acicular crystals, having about 0.1 mm in length and forming crystalline aggregates in fissures and cavities of "gummite" in association of dark green metatorbernite crystals. It is orthorhombic, space group Bmmb, the unit-cell parameters refined from X-ray powder diffraction data are: a 16.032 (4), b 17.263(6), c 13.605(4) Å and V 3765(2) ų. Chemical analyses of dewindtite correspond to the empirical formula (Pb1.17Ca1.13K0.52Cu0.13Ba0.12Co0.04Ni0.01)Σ3.12(UO2)5.92[(PO4)3.49 (AsO4)0.41(SO4)0.10]Σ4.00O2(OH)1.66·12H2O on the basis of P+As+P 4 apfu. The origin of dewindtite is interpreted as product of in-situ supergene alteration of primary uranium mineralization in environment near under the present surface. [ABSTRACT FROM AUTHOR]
Titel: |
Dewindtit z uranového ložiska Zálesí u Javorníka v Rychlebských horách (Česká republika).
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Autor/in / Beteiligte Person: | SEJKORA, JIŘÍ ; PAULIŠ, PETR ; TOEGEL, VLASTIMIL ; VRTIŠKA, LUBOŠ ; MALÍKOVÁ, RADANA |
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Zeitschrift: | Bulletin Mineralogicko-Petrologickeho Oddeleni Narodniho Muzea v Praze, Jg. 24 (2016), Heft 1, S. 63-69 |
Veröffentlichung: | 2016 |
Medientyp: | academicJournal |
ISSN: | 1211-0329 (print) |
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