AM_Mg2SiO4
Formula: Si Mg2 O4
Name: Mg2SiO4
Unit cell: 10.11 5.77 4.7 90.0 90.0 90.0 , V=274.17
Space group: P12/M1 (10)

Baur W H , American Mineralogist , 57 (1972) p.709-731, Computer-simulated crystal structures of observed and hypothetical Mg2SiO4, polymorphs of low and high density, Model I