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 = 9.0 Gpa _database_code_amcsd 0001311 4.1337 4.1337 2.6517 90 90 90 P4_2/mnm atom x y z Biso Si 0 0 0 .13 O .3057 .3057 0 .09