COL  ICSD Collection Code 9685
 DATE Recorded Jan 1, 1980; updated Apr 26, 1985
 NAME Magnesium silicate
 MINR Forsterite - synthetic
 MINR Olivine
 FORM Mg2 Si O4
      = Mg2 O4 Si
 TITL The Crystal Structures of Forsterite and Hortonolite at several 
      Temperatures up to 900C
 REF  American Mineralogist
      AMMIA 58 (1973) 588-593
 AUT  Smyth J R, HazenÿRÿM
 CELL a=4.756 b=10.207 c=5.980 à=90.0 á=90.0 ç=90.0
      V=290.3 Z=4
 SGR  P b n m       (62) - orthorhombic
 CLAS mmm   (Hermann-Mauguin) - D2h (Schoenflies)
 PRS  oP28
 ANX  AB2X4
 PARM Atom__No OxStat  Wyck ---X--- ---Y--- ---Z---  -SOF-
      Mg     1  2.000    4a  0.      0.      0.
      Mg     2  2.000    4d  0.9915  0.2774  1/4
      Si     1  4.000    4d  0.4262  0.094   1/4
      O      1 -2.000    4d  0.7657  0.0913  1/4
      O      2 -2.000    4d  0.2215  0.4474  1/4
      O      3 -2.000    8e  0.2777  0.1628  0.0331
 WYCK e d4 a
 ITF  Mg  1   B=0.26
 ITF  Mg  2   B=0.22
 ITF  Si  1   B=0.08
 ITF  O   1   B=0.27
 ITF  O   2   B=0.24
 ITF  O   3   B=0.27
 REM  TEM 293
 RVAL 0.048
 TEST At least one temperature factor is implausible or meaningless but 
      agrees with the value given in the paper. (Code 52)