Aegirine 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 0000336 9.658 8.795 5.294 90 107.42 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 .2905 .0894 .2351 .00050 .00073 .00385 -.00008 -.00029 -.00001 Fe1 0 .8989 1/4 .00082 .00086 .00457 0 -.00019 0 Na2 0 .2999 1/4 .00339 .00189 .00829 0 -.00119 0 O1 .1141 .0784 .1380 .00058 .00124 .00464 -.00014 -.00053 .00012 O2 .3582 .2558 .3001 .00133 .00085 .00748 -.00053 .00016 .00000 O3 .3518 .0079 .0118 .00107 .00190 .00512 .00017 .00001 -.00085