Chenowethite, rare Mg-uranyl-sulphate, from the Jáchymov ore district, Krušné hory Mountains (Czech Republic) - description and Raman spectroscopy

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00023272%3A_____%2F24%3A10136516" target="_blank" >RIV/00023272:_____/24:10136516 - isvavai.cz</a>

Alternative codes found

RIV/68378271:_____/24:00601228

Result on the web

<a href="http://www.bullmineral.cz/paper/download/348/fulltext" target="_blank" >http://www.bullmineral.cz/paper/download/348/fulltext</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.46861/bmp.32.037" target="_blank" >10.46861/bmp.32.037</a>

Result language

angličtina

Original language name

Chenowethite, rare Mg-uranyl-sulphate, from the Jáchymov ore district, Krušné hory Mountains (Czech Republic) - description and Raman spectroscopy

Original language description

We studied a rare magnesium uranyl sulphate mineral, chenowethite, from the Jáchymov ore district, Krušné hory Mountains (Czech Republic). It was confirmed from the two samples originating from the Svornost mine in Jáchymov. Chenowethite forms rich crystalline aggregates on supergene-altered rocks in association with dark yellow to orange mineral of the zippeite group and white acicular crystals of gypsum. Its randomly arranged aggregates are composed of elongated thin tabular crystals up to 100 μm in length. Chenowethite is pale or bright yellow with a pale yellow streak and fluoresces greenish yellow, weak or dull under 254 nm and 366 nm UV-radiation, respectively. Chenowethite crystals are transparent to translucent and have an intensive vitreous luster. It is very brittle, and at least one system of perfect cleavage (along {010}) was observed. The quantitative chemical analyses of chenowethite agree well with the proposed ideal composition and correspond to the following empirical formulae (on the basis of 2 U atoms pfu) (Mg1.02Fe0.03Mn0.03)Σ1.08[(UO2)2(SO4)2.06(OH)2.04].11H2O (sample A) and (Mg0.92Fe0.11Mn0.04Zn0.01)Σ1.08[(UO2)2(SO4)1.96(SiO4)0.01(OH)2.23].11H2O (sample B). Chenowethite is orthorhombic, the space group Cmcm, with the unit-cell parameters refined from X-ray powder diffraction data: a 6.9329(8), b 19.0019(15), c 16.3298(15) Å and V 2151.2(3) Å3 (sample A) and a 6.937(3), b 19.019(5), c 16.348(6) Å and V 2156.8(1.1) Å3 (sample B). Vibrational (Raman and infrared) spectroscopy documents the presence of molecular water, uranyl and suphate units in the crystal structure of chenowethite.

Czech name

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Czech description

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Type

J_ost - Miscellaneous article in a specialist periodical

CEP classification

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OECD FORD branch

10504 - Mineralogy

Project

<a href="/en/project/LM2018110" target="_blank" >LM2018110: CzechNanoLab research infrastructure</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2024

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Bulletin Mineralogie Petrologie

ISSN

2570-7337

e-ISSN

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Volume of the periodical

32

Issue of the periodical within the volume

1

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

8

Pages from-to

37-44

UT code for WoS article

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EID of the result in the Scopus database

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