AM_Tridymite Formula: Si O2 Name: Tridymite Unit cell: 18.524 5.0032 23.81 90.0 105.82 90.0 , V=2123.11 Space group: C1C1 (9)

Dollase W A , Baur W H , American Mineralogist , 61 (1976) p.971-978, The superstructure of meteoritic low tridymite solved by computer simulation