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 = 4.22 GPa _database_code_amcsd 0004498 9.6341 8.7948 5.1926 90 105.421 90 C2/c atom x y z Biso Mg 0 .90951 .25 .49 Ca 0 .30368 .25 .85 Si .28618 .09426 .22772 .59 O1 .11512 .08768 .14162 .77 O2 .36057 .25337 .31985 .90 O3 .35221 .02031 .99045 .77