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 = 8.88 GPa _database_code_amcsd 0004502 9.5391 8.6752 5.1385 90 105.106 90 C2/c atom x y z Biso Mg 0 .91042 .25 .41 Ca 0 .30559 .25 .69 Si .28632 .09520 .22734 .50 O1 .11525 .08839 .14192 .58 O2 .35930 .25638 .32204 .71 O3 .35290 .02239 .98742 .67