Enstatite Gatta G D, Rinaldi R, Knight K S, Molin G, Artioli G Physics and Chemistry of Minerals 34 (2007) 185-200 High temperature structural and thermoelastic behaviour of mantle orthopyroxene: an in situ neutron powder diffraction study Sample: T = 1125 C _database_code_amcsd 0009061 18.4378 8.9555 5.2711 90 90 90 Pbca atom x y z occ Uiso MgM1 .3811 .6518 .8904 .925 .04085 FeM1 .3811 .6518 .8904 .065 .04085 MgM2 .3732 .4852 .3656 .895 .04562 FeM2 .3732 .4852 .3656 .085 .04562 SiA .2712 .3470 .0615 .01538 SiB .4753 .3398 .7762 .97 .01538 AlB .4753 .3398 .7762 .03 .01538 O1A .1854 .3386 .0530 .01742 O1B .5626 .3437 .7859 .01742 O2A .3114 .5040 .0467 .01742 O2B .4321 .4944 .7037 .01742 O3A .3024 .2351 -.1703 .01742 O3B .4499 .2067 .5783 .01742