Uramphite from Nová Ves pod Pleší (Czech Republic), the third world occurrence - description and vibrational spectroscopy

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00023272%3A_____%2F24%3A10136541" target="_blank" >RIV/00023272:_____/24:10136541 - isvavai.cz</a>

Result on the web

<a href="http://www.jgeosci.org/content/jgeosci.395_Sejkora.pdf" target="_blank" >http://www.jgeosci.org/content/jgeosci.395_Sejkora.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3190/jgeosci.395" target="_blank" >10.3190/jgeosci.395</a>

Result language

angličtina

Original language name

Uramphite from Nová Ves pod Pleší (Czech Republic), the third world occurrence - description and vibrational spectroscopy

Original language description

We have studied the rare ammonium uranyl phosphate mineral, uramphite, from the small uranium occurrence Nová Ves pod Pleší, central Bohemia (Czech Republic). It has been found on a few specimens and forms rare groups up to 1 mm in size in small vugs of limonite veins in altered rocks in association with meta-autunite, metatorbenite and churchite-(Y). Uramphite is pale yellow to light greenish yellow with a pale yellow streak and shows weak fluorescence in a pale yellow hue under 254 nm and 366 nm UV-radiation, respectively. Uramphite crystals are transparent to translucent and have an intensive vitreous luster. The mineral is very brittle and at least one system of perfect cleavage along {001} was observed. The quantitative electron-microprobe chemical analyses of uramphite agree well with the proposed ideal composition and correspond to the following empirical formula [(NH4)0.79Na0.12K0.07Ca0.03]Σ1.01(UO2)1.00(PO4)1.00.3H2O (on the basis of 1 P atom pfu). Uramphite is tetragonal, space group P4/ncc, with the unit-cell parameters refined from X-ray powder diffraction data: a = 7.0292(11), c = 18.092(2) Å, V = 893.9(2) Å3. Vibrational (Raman and infrared) spectroscopy documented the presence of molecular water, ammonium, uranyl, and phosphate groups in the crystal structure of uramphite.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10504 - Mineralogy

Project

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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

Journal of Geosciences

ISSN

1802-6222

e-ISSN

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Volume of the periodical

69

Issue of the periodical within the volume

3

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

10

Pages from-to

173-182

UT code for WoS article

001382486700004

EID of the result in the Scopus database

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