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 = 10.16 GPa _database_code_amcsd 0004504 9.5164 8.6449 5.1246 90 105.033 90 C2/c atom x y z Biso Mg 0 .91075 .25 .44 Ca 0 .30587 .25 .67 Si .28610 .09554 .22718 .47 O1 .11538 .08832 .14178 .57 O2 .35921 .25714 .32226 .68 O3 .35409 .02340 .98725 .67