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 = 400 C
pyroxene
_database_code_amcsd 0000360
9.597 8.751 5.274 90 107.29 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   .2920 .0918 .2328 .00178 .00180 .01221 -.00020  .00204 -.00015
Cr1      0 .9072   1/4 .00194 .00195 .01226       0  .00196       0
Na2      0 .3001   1/4 .00719 .00335 .01819       0 -.00035       0
O1   .1139 .0794 .1369 .00223 .00311 .01507 -.00033  .00278  .00010
O2   .3607 .2571 .3012 .00352 .00214 .02085 -.00134  .00268 -.00220
O3   .3521 .0099 .0062 .00324 .00377 .01578  .00037  .00280 -.00084