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 = 600 C pyroxene _database_code_amcsd 0000347 9.884 9.11 5.264 90 105.11 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 .2875 .0918 .2329 .00264 .00315 .00843 -.00017 .00132 -.00027 Fe1 0 .9057 1/4 .00362 .00384 .01068 0 .00110 0 Ca2 0 .2990 1/4 .00645 .00440 .01377 0 -.00051 0 O1 .1194 .0894 .1514 .00285 .00522 .01290 -.00003 .00110 .00043 O2 .3620 .2444 .3200 .00628 .00417 .01778 -.00167 .00223 -.00120 O3 .3494 .0172 .9969 .00402 .00585 .01177 -.00010 .00224 -.00263