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 = 800 C
pyroxene
_database_code_amcsd 0000339
9.711 8.876 5.312 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   .2902 .0888 .2327 .00272 .00436 .01020 -.49000  .00147 -.28000
Fe1      0 .8969   1/4 .00331 .00457 .01195       0  .00122       0
Na2      0 .3002   1/4 .01312 .00858 .02591       0 -.00144       0
O1   .1146 .0771 .1356 .00275 .00641 .01382 -.40000  .00111  .89000
O2   .3588 .2532 .2967 .00590 .00510 .02409 -.00212  .00354 -.00111
O3   .3507 .0070 .0093 .00420 .00810 .01416 -.15000  .00227 -.00284