Crystal structure of the uranyl-oxide mineral rameauite

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F16%3A00111286" target="_blank" >RIV/00216224:14310/16:00111286 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378271:_____/16:00470086 RIV/00023272:_____/16:10133612

Výsledek na webu

<a href="https://www.researchgate.net/publication/304461313_Crystal_structure_of_the_uranyl-oxide_mineral_rameauite" target="_blank" >https://www.researchgate.net/publication/304461313_Crystal_structure_of_the_uranyl-oxide_mineral_rameauite</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1127/ejm/2016/0028-2568" target="_blank" >10.1127/ejm/2016/0028-2568</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Crystal structure of the uranyl-oxide mineral rameauite

Popis výsledku v původním jazyce

Rameauite is a rare supergene uranyl-oxide hydroxy-hydrate mineral that forms during hydration-oxidation weathering of uraninite. On the basis of single-crystal X-ray diffraction data collected on a microfocus source, rameauite is monoclinic, space group Cc, with a = 13.9458(19), b = 14.3105(19), c = 13.8959(18) angstrom, beta = 118.477(14)degrees, V = 2437.7(6) angstrom(3) and Z = 4, with D-calc = 5.467 g cm(-3). The structure of rameauite (R = 0.060 for 1698 unique observed reflections) contains sheets of the beta-U3O8 topology, with both UO6 and UO7 bipyramids, which is similar to the sheets found in spriggite, ianthinite and wyartite. The sheets alternate with the interlayer, which contains K+, Ca2+ and H2O molecules. Interstitial cations are linked into infinite chains that extend along [10-1]. Adjacent sheets are linked through K-O, Ca-O and H-bonds. The structural formula of rameauite is K2Ca((H2O)-O-[3]) 1((H2O)-O-[5])(4)[(UO2) O-6(6)(OH)(4)](H-2([4]) O)(1). The empirical formula obtained from the average of eight electron-microprobe analyses is (on the basis of 6 U p.f.u.) K-1.87(Ca1.10Sr0.04)(Sigma 1.14)[(UO2)(6)O-6(OH)(4.15)]center dot 6H(2)O. The Raman spectrum is dominated by U-O and O-H vibrations. A discussion of related uranyl- oxide minerals is given.

Název v anglickém jazyce

Crystal structure of the uranyl-oxide mineral rameauite

Popis výsledku anglicky

Rameauite is a rare supergene uranyl-oxide hydroxy-hydrate mineral that forms during hydration-oxidation weathering of uraninite. On the basis of single-crystal X-ray diffraction data collected on a microfocus source, rameauite is monoclinic, space group Cc, with a = 13.9458(19), b = 14.3105(19), c = 13.8959(18) angstrom, beta = 118.477(14)degrees, V = 2437.7(6) angstrom(3) and Z = 4, with D-calc = 5.467 g cm(-3). The structure of rameauite (R = 0.060 for 1698 unique observed reflections) contains sheets of the beta-U3O8 topology, with both UO6 and UO7 bipyramids, which is similar to the sheets found in spriggite, ianthinite and wyartite. The sheets alternate with the interlayer, which contains K+, Ca2+ and H2O molecules. Interstitial cations are linked into infinite chains that extend along [10-1]. Adjacent sheets are linked through K-O, Ca-O and H-bonds. The structural formula of rameauite is K2Ca((H2O)-O-[3]) 1((H2O)-O-[5])(4)[(UO2) O-6(6)(OH)(4)](H-2([4]) O)(1). The empirical formula obtained from the average of eight electron-microprobe analyses is (on the basis of 6 U p.f.u.) K-1.87(Ca1.10Sr0.04)(Sigma 1.14)[(UO2)(6)O-6(OH)(4.15)]center dot 6H(2)O. The Raman spectrum is dominated by U-O and O-H vibrations. A discussion of related uranyl- oxide minerals is given.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10504 - Mineralogy

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

European Journal of Mineralogy

ISSN

0935-1221

e-ISSN

1617-4011

Svazek periodika

28

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

9

Strana od-do

959-967

Kód UT WoS článku

000399807600009

EID výsledku v databázi Scopus

2-s2.0-85010875051