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 = 8.7 GPa Note: cell parameters obtained by linear regression _database_code_amcsd 0001871 9.668 8.756 5.128 90 103.82 90 C2/c atom x y z Biso Ca 0 .30447 .25 .52 Fe 0 .91001 .25 .41 Si .28793 .09474 .23087 .39 O1 .12003 .09248 .15227 .62 O2 .35991 .25203 .32914 .77 O3 .35338 .02592 .98464 .63