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 = 6.3 GPa Note: cell parameters obtained by linear regression _database_code_amcsd 0001869 9.707 8.827 5.156 90 103.99 90 C2/c atom x y z Biso Ca 0 .30336 .25 .55 Fe 0 .90972 .25 .41 Si .28756 .094256 .23086 .44 O1 .11943 .09205 .15201 .58 O2 .36140 .25068 .32834 .82 O3 .35246 .02412 .98553 .67