Hedenbergite Cameron M, Sueno S, Prewitt C T, Papike J J American Mineralogist 58 (1973) 594-618 High-temperature crystal chemistry of acmite, diopside, hedenbergite, jadeite, spodumene, and ureyite T = 24 C pyroxene _database_code_amcsd 0000345 9.845 9.024 5.245 90 104.74 90 C2/c atom x y z B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3) Si .2878 .0924 .2326 .00111 .00116 .00359 -.00004 .00053 -.00022 Fe1 0 .9075 1/4 .00127 .00119 .00439 0 .00051 0 Ca2 0 .3003 1/4 .00215 .00171 .00532 0 .00006 0 O1 .1197 .0904 .1525 .00120 .00222 .00550 .00017 .00044 -.00007 O2 .3627 .2461 .3228 .00251 .00198 .00732 -.00065 .00086 -.00040 O3 .3502 .0198 .9932 .00165 .00246 .00582 -.00014 .00104 -.00112