Topaz Komatsu K, Kagi H, Marshall W G, Kuribayashi T, Parise J B, Kudoh Y American Mineralogist 93 (2008) 217-227 Pressure dependence of the hydrogen-bond geometry in topaz-OD from neutron powder diffraction Locality: synthetic Sample: 25 tons, P = 1.9 GPa _database_code_amcsd 0004519 4.7129 8.9046 8.3802 90 90 90 Pbnm atom x y z occ Uiso Al .902 .1340 .0843 .0076 Si .4035 .9417 .25 .0076 O1 .7136 .0288 .25 .0060 O2 .443 .7580 .25 .0060 O3 .2150 .9927 .0920 .0060 O4 .5930 .2533 .0662 .0060 D1 .457 .1879 .1209 .59 .061 D2 .526 .285 .1718 .41 .041