COL  ICSD Collection Code 31266
 DATE Recorded Dec 31, 1982
 NAME Uranyl tetrabismuth tetraoxide arsenate dihydrate
 MINR Walpurgite - from Schneeberg, Sachsen, German Democratic Republic
 FORM (U O2) Bi4 O4 (As O4)2 (H2 O)2
      = H4 As2 Bi4 O16 U
 TITL The Crystal Structure of Walpurgite,(U O2)Bi4 O4(As O4)2 * 2H2 O
 REF  TMPM. Tschermaks Mineralogische und Petrographische Mitteilungen 
      (1979-)
      TTMMD 30 (1982) 129-139
 AUT  Mereiter K
 CELL a=7.135 b=10.426 c=5.494 à=101.5 á=110.8 ç=88.2
      V=374.0 Z=1
 SGR  P -1          (2) - triclinic
 CLAS -1    (Hermann-Mauguin) - Ci  (Schoenflies)
 PRS  aP27
 ANX  AB2C4X16
 PARM Atom__No OxStat  Wyck ---X--- ---Y--- ---Z---  -SOF-
      U      1  6.000    1a  0.      0.      0.
      Bi     1  3.000    2i  0.21    0.55881 0.94457
      Bi     2  3.000    2i  0.38368 0.34368 0.39357
      As     1  5.000    2i -0.0359  0.24    0.5745
      O      1 -2.000    2i  0.2502  0.025   0.2357
      O      2 -2.000    2i  0.1286  0.4214  1.1284
      O      3 -2.000    2i  0.4907  0.5002  0.7383
      O      4 -2.000    2i  0.1255  0.3627  0.6043
      O      5 -2.000    2i -0.2359  0.298   0.6466
      O      6 -2.000    2i -0.1094  0.1648  0.2517
      O      7 -2.000    2i  0.0865  0.1366  0.7765
      OH2    8 -2.000    2i  0.5134  0.7847  1.065
      H      1  1.000    4 Atoms not located in Unit Cell
 WYCK i11 a
 ITF  O   1   B=2.2
 ITF  O   2   B=0.9
 ITF  O   3   B=1.
 ITF  O   4   B=1.6
 ITF  O   5   B=1.4
 ITF  O   6   B=1.7
 ITF  O   7   B=1.7
 ITF  O   8   B=3.5
ÿ
 TF   Atom   U(1,1)  U(2,2)  U(3,3)  U(1,2)  U(1,3)  U(2,3)
      U  1    0.0148  0.0076  0.0125  0.0013  0.0059  0.0011
      Bi 1    0.0148  0.0131  0.0127  0.0014  0.0063  0.0039
      Bi 2    0.0121  0.0088  0.0130  0.0015  0.0041  0.0014
      As 1    0.0177  0.0110  0.0178  0.0030  0.0083  0.0031
 RVAL 0.041