COL  ICSD Collection Code 66451
 DATE Recorded Jan 6, 1993; updated Jun 29, 1998
 NAME Aluminium silicon oxide (4.5/1.5/9.7)
 MINR Mullite - synthetic
 FORM Al4.52 Si1.48 O9.74
      = Al4.52 O9.74 Si1.48
 TITL Structure refinement of mullite by the rietveld method and a new 
      method for estimation of chemical composition
 REF  Journal of the American Ceramic Society
      JACTA 75 (1992) 227-230
 AUT  Ban T, OkadaÿK
 CELL a=7.546 b=7.694 c=2.883 à=90.0 á=90.0 ç=90.0
      V=167.4 D=3.00 Z=1
 SGR  P b a m       (55) - orthorhombic
 CLAS mmm   (Hermann-Mauguin) - D2h (Schoenflies)
 PRS  oP16
 ANX  A3X5
 PARM Atom__No OxStat  Wyck ---X--- ---Y--- ---Z---  -SOF-
      Al     1  3.000    2a  0.      0.      0.
      Al     2  3.000    4h  0.1487  0.3411  1/2       0.5
      Si     2  4.000    4h  0.1487  0.3411  1/2       0.369
      Al     3  3.000    4h  0.2604  0.2073  1/2       0.131
      O      1 -2.000    4h  0.3575  0.4227  1/2
      O      2 -2.000    4g  0.1273  0.2206  0.
      O      3 -2.000    2d  1/2     0.      1/2       0.607(4)
      O      4 -2.000    4h  0.4418  0.0522  1/2       0.131
 WYCK h4 g d a
 ITF  Al  1   B=1.61(2)
 ITF  Al  2   B=1.61(2)
 ITF  Si  2   B=1.61(2)
 ITF  Al  3   B=1.61(2)
 ITF  O   1   B=1.61(2)
 ITF  O   2   B=1.61(2)
 ITF  O   3   B=1.61(2)
 ITF  O   4   B=1.61(2)
 REM  XDP (X-ray diffraction from a powder)
 REM  RVP
 REM  M PDF 15-776
 RVAL 0.015
 TEST Calculated density unusual but tolerable. (Code 23)