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 = 1200 C _database_code_amcsd 0009058 18.4588 8.9638 5.2848 90 90 90 Pbca atom x y z occ Uiso MgM1 .3814 .6504 .8953 .919 .04519 FeM1 .3814 .6504 .8953 .071 .04519 MgM2 .3723 .4848 .3715 .901 .05034 FeM2 .3723 .4848 .3715 .079 .05034 SiA .2710 .3464 .0655 .01735 SiB .4757 .3423 .7714 .97 .01735 AlB .4757 .3423 .7714 .03 .01735 O1A .1854 .3383 .0582 .01959 O1B .5632 .3427 .7823 .01959 O2A .3113 .5029 .0474 .01959 O2B .4324 .4964 .7068 .01959 O3A .3027 .2368 -.1691 .01959 O3B .4503 .2093 .5739 .01959