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 = 1000 C _database_code_amcsd 0009066 18.4047 8.9366 5.2543 90 90 90 Pbca atom x y z occ Uiso MgM1 .3801 .6525 .8848 .928 .03640 FeM1 .3801 .6525 .8848 .062 .03640 MgM2 .3748 .4852 .3611 .892 .03988 FeM2 .3748 .4852 .3611 .088 .03988 SiA .2711 .3481 .0582 .01347 SiB .4747 .3375 .7783 .97 .01347 AlB .4747 .3375 .7783 .03 .01347 O1A .1852 .3385 .0474 .01531 O1B .5624 .3426 .7875 .01531 O2A .3108 .5052 .0462 .01531 O2B .4322 .4911 .7018 .01531 O3A .3027 .2335 -.1701 .01531 O3B .4496 .2037 .5820 .01531