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 = 2.32 GPa _database_code_amcsd 0004497 9.6808 8.8488 5.2180 90 105.606 90 C2/c atom x y z Biso Mg 0 .90867 .25 .37 Ca 0 .30270 .25 .72 Si .28626 .09370 .22834 .43 O1 .11547 .08705 .14258 .62 O2 .36079 .25183 .31872 .71 O3 .35156 .01943 .99227 .60