AM_Topaz_8 Formula: Al2 Si O6 D2 Name: Topaz Unit cell: 4.7248 8.925 8.41 90.0 90.0 90.0 , V=354.64 Space group: PBNM (62)

Komatsu K , Kagi H , Marshall W G , Kuribayashi T , Parise J B , Kudoh Y , American Mineralogist , 93 (2008) p.217-227, Pressure dependence of the hydrogen-bond geometry in topaz-OD from neutron, powder diffraction, Locality: synthetic, Sample: 15 tons, P = 0.7 GPa