Record details

Title
    The crystal structure of Na4(UO2)(CO3)3 and its relationship to schröckingerite
Statement of responsibility
    Yaping Li, S.V. Krivovichev, P.C. Burns
Author
    Burns, P. C.
    Krivovichev, S. V.
    Li, Yaping
Language
    anglicky
Source title - serial
    Mineralogical magazine
Vol./nr.
    Vol. 65, no. 2
Pages
    p. 297-304
Year
    2001
Notes
    2 obr., 5 tab., 18 bibl.
    il.
    Zkr. název ser.: Mineral. Mag.
Subject group
    elektrárna jaderná
    havárie
    karbonáty
    krystalová struktura
    minerály supergenní
    minerály uranu
    odpad radioaktivní
    syntéza minerálu
Geographical name
    Černobyl (Ukrajina)
    ČR-Čechy
    Jáchymov (Karlovy Vary)
    Ukrajina
Keyword
    Crystal
    Na4(UO2)(CO3)3
    Relationship
    Schröckingerite
    Structure
Abstract (in english)
   rystals of the compound Na4(UO2)(CO3)3 have been synthesized and the structure has been solved. it is trigonal with a = 9.3417(6), c = 12.824(1) A, V = 969.2(1) A3, space group P3c1 and Z = 4. The structure was refined on the basis of Fř (wR2 = 4.2%) for all unique data collected using Mo-K X- radiation and a CCD-based detector. The final R1 was 2.0% calculated for 534 unique observed (Fo 4) reflections, and the goodness-of-fit (S) was 0.91. The structure contains a uranyl tricarbonate cluster composed of a uranyl hexagonal bipyramid that shares three equatorial edges with CO3 triangles. The uranyl tricarbonate clusters are connected through NaO6 and NaO5 polyhedra, forming a heteropolyhedral framework structure. This compound may be related to a uranyl carbonate phase with the same composition which has been reported as an alteration phase on the surface of Chernobyl "lava", and as a mineral in the Jáchymov ore district, Czech Republic
Contributor
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
    U
Entered date
    16. 8. 2007
Import date
    8. 8. 2012