COL  ICSD Collection Code 63532
 DATE Recorded Dec 19, 1988; updated Jan 19, 1999
 NAME Silicon dioxide
 MINR Quartz low
 FORM Si O2
      = O2 Si
 TITL Crystal structures of quartz and magnesium germanate by profile 
      analysis of synchrotron-radiation high-resolution powder data.
 REF  Journal of Applied Crystallography
      JACGA 21 (1988) 182-191  Issue 2
 AUT  Will G, Bellotto’M, Parrish’W, Hart’M
 CELL a=4.912 b=4.912 c=5.404 ą=90.0 į=90.0 ē=120.0
      V=112.9 D=2.66 Z=3
 SGR  P 32 2 1      (154) - trigonal
 CLAS 32    (Hermann-Mauguin) - D3  (Schoenflies)
 PRS  hP9
 ANX  AX2
 PARM Atom__No OxStat  Wyck ---X--- ---Y--- ---Z---  -SOF-
      Si     1  4.000    3a  0.4704  0.      2/3
      O      1 -2.000    6c  0.4136  0.2676  0.7857
 WYCK c a
’
 TF   Atom   į(1,1)  į(2,2)  į(3,3)  į(1,2)  į(1,3)  į(2,3)
      Si 1    0.0059  0.0034  0.0043  0.0017 -0.0010 -0.0020
      O  1    0.0080  0.0090  0.0090  0.0120 -0.0020  0.0000
 REM  SNP (synchroton radiation, powder diffraction)
 REM  M PDF 33-1161, R(isotropic)=0.022
 RVAL 0.016