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 = 1.04 GPa
18.186 8.782 5.1610 90 90 90 Pbca
atom     x     y     z Biso
Mg1  .3768 .6545 .8627  .51
Mg2  .3770 .4860 .3556  .64
SiA  .2716 .3421 .0482  .49
SiB  .4737 .3365 .7997  .41
O1a  .1823  .338  .032  .87
O2a  .3111  .504  .043  .59
O3a  .3030  .223  .829  .18
O1b  .5627  .340  .800  .63
O2b  .4315  .483  .686  .37
O3b  .4472  .194  .607  .52