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 = 1 atm _database_code_amcsd 0004495 9.7397 8.9174 5.2503 90 105.866 90 C2/c atom x y z Biso Mg 0 .908083 .25 .31 Ca 0 .301478 .25 .65 Si .286187 .093189 .229355 .34 O1 .11554 .08690 .14186 .55 O2 .36094 .25019 .31776 .62 O3 .35073 .01744 .99543 .56