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 = 9.9 GPa Note: cell parameters obtained by linear regression _database_code_amcsd 0001872 9.647 8.718 5.114 90 103.74 90 C2/c atom x y z Biso Ca 0 .30506 .25 .53 Fe 0 .91031 .25 .42 Si .28757 .09506 .23088 .39 O1 .11954 .09289 .15248 .61 O2 .35991 .25226 .33002 .74 O3 .35335 .02593 .98444 .62