AM_Seifertite Formula: Si O2 Name: Seifertite Unit cell: 4.097 5.0462 4.4946 90.0 90.0 90.0 , V=92.92 Space group: PBCN (60)

Dera P , Prewitt C T , Boctor N Z , Hemley R J , American Mineralogist , 87 (2002) p.1018-1023, Characterization of a high-pressure phase of silica from the, Martian meteorite Shergotty, alpha-PbO2-like