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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

10504 - Mineralogy

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Journal of Geosciences

ISSN

1802-6222

e-ISSN

—

Svazek periodika

69

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

10

Strana od-do

173-182

Kód UT WoS článku

001382486700004

EID výsledku v databázi Scopus

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