Hedenbergite Zhang L, Ahsbahs H, Hafner S S, Kutoglu A American Mineralogist 82 (1997) 245-258 Single-crystal compression and crystal structure of clinopyroxene up to 10 GPa Sample: at P = 3.6 GPa Note: cell parameters obtained by linear regression _database_code_amcsd 0001865 9.756 8.906 5.189 90 104.25 90 C2/c atom x y z Biso Ca 0 .30210 .25 .56 Fe 0 .90860 .25 .45 Si .28768 .09394 .23127 .41 O1 .11987 .09107 .15330 .69 O2 .36200 .24843 .32509 .91 O3 .35217 .02278 .98826 .60