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 = 9.50 GPa _database_code_amcsd 0004503 9.5270 8.6587 5.1306 90 105.067 90 C2/c atom x y z Biso Mg 0 .91060 .25 .39 Ca 0 .30588 .25 .70 Si .28614 .09547 .22733 .50 O1 .11520 .08809 .14222 .65 O2 .35914 .25645 .32137 .68 O3 .35342 .02336 .98756 .65