Topaz
Northrup P A, Leinenweber K, Parise J B
American Mineralogist 79 (1994) 401-404
The location of H in the high-pressure synthetic Al2SiO4(OH)2 topaz analogue
Sample fluor-topaz from a Mexican rhyolite
_database_code_amcsd 0001642
4.652 8.801 8.404 90 90 90 Pbnm
atom      x      y      z Biso
Al   .90303 .13090 .08283  .34
Si   .39723 .94035    .25  .29
O1    .7036  .0321    .25  .38
O2    .4577  .7560    .25  .39
O3    .2102  .9892  .0924  .37
F     .5982  .2525  .0561  .52