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 = 600 C
pyroxene
_database_code_amcsd 0000361
9.612 8.77 5.279 90 107.25 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 .0912 .2324 .00213 .00255 .01040 -.00025  .00207 -.00014
Cr1      0 .9066   1/4 .00235 .00213 .01103       0  .00181       0
Na2      0 .3010   1/4 .00938 .00427 .02176       0 -.00089       0
O1   .1140 .0782 .1362 .00183 .00386 .01103 -.00032  .00255  .00066
O2   .3611 .2573 .3025 .00447 .00256 .02080 -.00161  .00372 -.00094
O3   .3519 .0094 .0074 .00308 .00447 .01486 -.00027  .00234 -.00287