Diopside
Levien L, Prewitt C T
American Mineralogist 66 (1981) 315-323
High-pressure structural study of diopside
P = 53.0  kbar
pyroxene
_database_code_amcsd 0000815
9.612 8.765 5.1793 90 105.32 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     .2864 .0946 .2279  .0008  .0013  .0031 -.00011  .0004 -.0003
Mg1        0 .9097   .25  .0011  .0014  .0028       0  .0003      0
Ca2        0 .3040   .25  .0021  .0016  .0041       0      0      0
O1     .1147 .0880 .1414  .0014  .0018  .0046  .00010  .0008 -.0005
O2     .3608 .2542 .3212  .0015  .0019  .0050 -.00030  .0004 -.0003
O3     .3527 .0213 .9889  .0016  .0020  .0039 -.00010  .0006 -.0005