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 = 2.8 GPa Note: cell parameters obtained by linear regression _database_code_amcsd 0001864 9.772 8.931 5.200 90 104.34 90 C2/c atom x y z Biso Ca 0 .30114 .25 .55 Fe 0 .90831 .25 .45 Si .28797 .09255 .23180 .43 O1 .12006 .09073 .15283 .65 O2 .36200 .24830 .32479 .84 O3 .35139 .02186 .98851 .55