COL  ICSD Collection Code 31130
 DATE Recorded Jan 1, 1980; updated May 13, 1997
 NAME Zirconium silicate
 MINR Zircon - from Ural, USSR
 FORM Zr (Si O4)
      = O4 Si Zr
 TITL The crystalline structure of zircon.
 REF  Mineralogical Magazine and Journal of the Mineralogical Society 
      (1876-1968)
      MIASA 21 (1926) 176-187
 AUT  Binks W
 CELL a=6.580 b=6.580 c=5.930 à=90.0 á=90.0 ç=90.0
      V=256.7 D=4.70 Z=4
 SGR  I 41/a m d S  (141) - tetragonal
 CLAS 4/mmm (Hermann-Mauguin) - D4h (Schoenflies)
 PRS  tI24
 ANX  ABX4
 PARM Atom__No OxStat  Wyck ---X--- ---Y--- ---Z---  -SOF-
      Zr     1  4.000    4a  0.      0.      0.
      Si     1  4.000    4b  0.      0.      1/2
      O      1 -2.000   16h  0.      0.21    0.33
 WYCK h b a
 REM  XDP (X-ray diffraction from a powder)
 REM  F a=9.30 given in the paper refers to an F-centered cell
 TEST No R value given in the paper. (Code 51)
 TEST At least one temperature factor missing in the paper. (Code 53)