Diopside Thompson R M, Downs R T American Mineralogist 93 (2008) 177-186 The crystal structure of diopside at pressure to 10 GPa Locality: DeKalb, New York Sample: P = 5.11 GPa _database_code_amcsd 0004499 9.6135 8.7695 5.1813 90 105.337 90 C2/c atom x y z Biso Mg 0 .90961 .25 .38 Ca 0 .304111 .25 .67 Si .28607 .094506 .22734 .47 O1 .11566 .08821 .14191 .64 O2 .35967 .25385 .31975 .67 O3 .35316 .02091 .99051 .66