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 = 8.01 GPa _database_code_amcsd 0004501 9.5557 8.6951 5.1474 90 105.148 90 C2/c atom x y z Biso Mg 0 .90998 .25 .41 Ca 0 .30528 .25 .73 Si .28595 .09523 .22701 .51 O1 .11494 .08890 .14173 .69 O2 .35903 .25554 .32144 .77 O3 .35425 .02211 .98887 .65