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 = 1.7 Gpa _database_code_amcsd 0001307 4.1713 4.1713 2.6655 90 90 90 P4_2/mnm atom x y z Biso Si 0 0 0 .14 O .3065 .3065 0 .39