Diopside
Levien L, Prewitt C T
American Mineralogist 66 (1981) 315-323
High-pressure structural study of diopside
P = 35.2 kbar
pyroxene
_database_code_amcsd 0000813
9.656 8.813 5.2026 90 105.49 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     .28643 .09420 .2282  .0008  .0013  .0029 -.00011  .0004 -.00009
Mg1         0 .90900   .25  .0009  .0012  .0028       0  .0004       0
Ca2         0 .30333   .25  .0020  .0016  .0044       0  .0001       0
O1      .1153  .0879 .1422  .0014  .0016  .0041       0  .0004       0
O2      .3608  .2529 .3196  .0015  .0016  .0058 -.00050  .0006 -.00040
O3      .3525  .0202 .9907  .0016  .0020  .0041       0  .0011 -.00090