Enstatite
Hugh-Jones D A, Chopelas A, Angel R J
Physics and Chemistry of Minerals 24 (1997) 301-310
Tetrahedral compression in (Mg,Fe)SiO3 orthopyroxenes
Sample: P = 1.04 GPa, natural orthopyroxene
_database_code_amcsd 0008019
18.189 8.7765 5.1723 90 90 90 Pbca
atom     x     y     z  occ Biso
MgM1 .3754 .6542 .8623       .06
MgM2 .3780 .4844 .3572  .66  .07
FeM2 .3780 .4844 .3572  .24  .07
CaM2 .3780 .4844 .3572 .012  .07
AlM2 .3780 .4844 .3572  .08  .07
SiTA .2703 .3429 .0479  .97  .01
AlTA .2703 .3429 .0479  .03  .01
SiTB .4752 .3369 .8022  .97  .01
AlTB .4752 .3369 .8022  .03  .01
O1a   .181 .3399  .032       .07
O2a   .308 .5036  .046       .07
O3a   .303  .225  .825       .07
O1b   .568  .338  .804       .07
O2b   .432  .483  .689       .07
O3b   .445  .191  .606       .07