Kosmochlor
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 0000359
9.579 8.722 5.267 90 107.37 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   .2921 .0918 .2333 .00142 .00131 .00147 -.00010  .00020 -.00016
Cr1      0 .9076   1/4 .00167 .00146 .00229       0  .00043       0
Na2      0 .3008   1/4 .00350 .00166 .00344       0 -.00119       0
O1   .1140 .0791 .1374 .00156 .00177 .00186 -.00013  .00029  .00040
O2   .3599 .2583 .3037 .00221 .00152 .00377 -.00064  .00041 -.00038
O3   .3531 .0105 .0066 .00176 .00240 .00243 -.00001  .00035 -.00116