Enstatite
Hugh-Jones D A, Angel R J
American Mineralogist 79 (1994) 405-410
A compressional study of MgSiO3 orthoenstatite up to 8.5 GPa
Sample: P = 8.10 GPa
17.950  8.604  5.080  90 90 90 Pbca
atom     x     y     z Biso
Mg1  .3766 .6589 .8558  .56
Mg2  .3774 .4834 .3462  .51
SiA  .2704 .3436 .0385  .27
SiB  .4730 .3383 .8042  .28
O1a  .1814  .344  .022  .27
O2a  .3082  .509  .031  .41
O3a  .3036  .222  .820  .62
O1b  .5602  .340  .812  .56
O2b  .4330  .486  .682  .19
O3b  .4451  .191  .615  .10