Record details

Title
    The crystal chemistry of the zippeite group
Statement of responsibility
    Peter C. Burns, Kathryn M. Deely, Leslie A. Hayden
Author
    Burns, Peter C.
    Deely, Kathryn M.
    Hayden, Leslie A.
Language
    anglicky
Source title - serial
    Canadian mineralogist
Vol./nr.
    Vol. 41, no. 3
Pages
    p. 687-706
Year
    2003
Notes
    10 obr., 21 tab., 2 s. bibl.
    Francouzské resumé
    il.
    Zkr. název ser.: Canad. Mineralogist
Subject group
    hořčík
    kobalt
    krystalochemie
    krystalová struktura
    minerály uranu
    rudy U
    sodík
    sulfáty
    syntéza minerálu
    uran
    zinek
    zpřesňování struktury
Geographical name
    ČR-Čechy
    Jáchymov (Karlovy Vary)
    USA-Utah
Keyword
    Chemistry
    Crystal
    Group
    Zippeite
Abstract (in english)
   Single crystals of eight zippeite-group compounds have obtained using mild hydrothermal synthesis techniques. The structure of each has been determined with single-crystal diffraction data collected using MoKalfa X-radiation and an APEX CCD-based detector, and refined on the basis of F2 for all unique data. The structure of zippeite, K3(H2O)3[(UO2)4(SO4)2O3(OH)], is mono-clinic, C2, a 8.7524(4), b 13.9197(7), c 17.6972(8) angstrom, beta 104.178(1)°, V2090.39(17) angstrom3,R1 3.30 procent,Dc 4.794g/cm3. The structure of sodium-zippeite, Na5(H2O)12[(UO2)8(SO4)4O5(OH)3], is monoclinic, P2,/n, a 17.6425(11), b 14.6272(9), c 17.6922(11) angstrom,beta 104.461(1)°, V4421.0(5) angstrom3, R1 6.88 per cent, Dc 4.517 g/cm3. The structure of magnesium-zippeite, Mg(H2O)3.5[(UO2)2(SO4)O2], is monoclinic, C2/m, a 8.6514(4), b 14.1938(7), c 17.7211(9) angstrom, beta 104.131(1)°, V 2110.24(18) angstrom3, R1 2.39 per cent Dc 4.756 g/cm3.
   The structure of zinc-zippeite, Zn(H2O)3.5[(UO2)2(SO4)O2], is monoclinic, C2/m, a 8.6437(10), b 14.1664(17), c 17.701(2) A, p 104.041(3)°, V2102.7(4) A3, ftl 4.57 per cent, Dc 5.032 g/cm3. The structure of cobalt-zippeite, Co(H2O)3.5[(UO2)2(SO4)O2;], is mono-clinic, C2/m, a 8.650(4), b 14.252(9), c 17.742(10) angstrom, p 104.092(19)°, V2122(2) angstrom3, R1 5.55 per cent, Dc 4.948 g/cm3. The structure of (NH4)4(H2O)[(UO2)2(SO4)O2]2 is monoclinic, C2/m, a 8.6987(15), b 14.166(2), c 17.847(3) angstrom, beta 104.117(4)°, V 2132.9(3) angstrom3, R1 4.31 per cent, Dc 4.442 g/cm3. The structure of (NH4)2[(UO2)2(SO4)O2] is orthorhombic, Cmca, a 14.2520(9), b 8.7748(5), c 17.1863( 10) angstrom, V 2149.3(2) angstrom3, R1 5.11 per cent , Dc 4.353 g/cm3. The structure of Mg2(H2O)11[(UO2)2(SO4)O2]2 is monoclinic, P21/c, a 8.6457(4), b 17.2004(8), c 18.4642(9) angstrom, beta 102.119(1)°, V 2684.6(2) angstrom3,R1 4.73 per cent, Dc 3.917 g/cm3.
   Each structure contains the zippeite-type sheet consisting of chains of edge-sharing uranyl pentagonal bipyramids that are cross-linked by vertex sharing with sulfate tetrahedra, although the compositional details of the sheet are varied. The interlayer configurations are diverse, and are related to the bonding requirements of the sheets
Contributor
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
    U
Entered date
    26. 9. 2007
Import date
    8. 8. 2012