AM_Mg2SiO4_4
Formula: Si Mg2 O4
Name: Mg2SiO4
Unit cell: 3.51 3.51 10.45 90.0 90.0 90.0 , V=128.75
Space group: I4/MMM (139)

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, K2MgF4 structure