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 = 4.6 GPa Note: cell parameters obtained by linear regression _database_code_amcsd 0001867 9.737 8.877 5.176 90 104.14 90 C2/c atom x y z Biso Ca 0 .30279 .25 .53 Fe 0 .90918 .25 .38 Si .28780 .09364 .23083 .42 O1 .12064 .09106 .15289 .59 O2 .36107 .24928 .32680 .72 O3 .35193 .02338 .98716 .65