Topaz-OH
Kanzaki M
American Mineralogist 95 (2010) 1349-1352
Crystal structure of a new high-pressure polymorph of topaz-OH
Locality: synthetic
P = 14 GPa, T = 1400 C
_database_code_amcsd 0017560
4.72318 8.91480 2.77276 90 90 90 Pbnm
atom      x     y   z occ  Uiso
AlT   .5876 .4402 .25 .01 .0163
SiT   .5876 .4402 .25 .20 .0163
AlOc1 .5812 .8587 .25 .60 .0213
SiOc1 .5812 .8587 .25 .11 .0213
AlOc2  .579 .6298 .25 .07 .0163
SiOc2  .579 .6298 .25 .01 .0163
O1    .5891 .2482 .25 .66 .0282
OH1   .5891 .2482 .25 .34 .0282
O2    .2365 .5098 .25 .66 .0334
OH2   .2365 .5098 .25 .34 .0334