cell    8.8380   8.3980  4.665  90.0000  90.0000  90.0000
Al1   13   .1312   .0818  .9052
O1     8   .7527   .0597  .9024  0.28
       9                         0.72
H1     1   .2508   .3380  .4973  0.28
Si1   14   .9408   .2500  .3995
O2     8   .5311   .2500  .7941
O3     8   .7561   .2500  .4527
O4     8   .0104   .9072  .7884
rgnr 62


ICSD
 COL  Collection Code 34064 (recorded Jan 1, 1980; updated Nov 2, 1984)
 NAME Aluminium fluoride hydroxide silicate *
 MINR Topaz - from Untersulzbachtal, Hohe Tauern, Salzburg, Austria
 FORM Al2 F1.44 (O H)0.56 Si O4
 TITL Strukturbestimmung eines OH-reichen Topases
 REF  OSAWA 116 (1979) 145-147
 AUT  Zobetz E, Zemann J, Heger G, Voellenkle H
 CELL a=4.665(1) b=8.838(4) c=8.398(6) à=90.0 á=90.0 ç=90.0
      V=346.3 Z=4
 SGR  P b n m       (62) - orthorhombic
 RVAL 0.028
 TEST At least one temperature factor is implausible or meaningless but 
      agrees with the value given in the paper. (Code 52)