Stishovite Ross N L, Shu J F, Hazen R M, Gasparik T American Mineralogist 75 (1990) 739-747 High-pressure crystal chemistry of stishovite P = 4.0 Gpa _database_code_amcsd 0001309 4.1593 4.1593 2.6613 90 90 90 P4_2/mnm atom x y z Biso Si 0 0 0 .12 O .3063 .3063 0 .39