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 = 1175 C _database_code_amcsd 0009059 18.4517 8.9612 5.2797 90 90 90 Pbca atom x y z occ Uiso MgM1 .3814 .6514 .8937 .928 .04322 FeM1 .3814 .6514 .8937 .062 .04322 MgM2 .3729 .4850 .3692 .892 .04855 FeM2 .3729 .4850 .3692 .088 .04855 SiA .2712 .3464 .0647 .01682 SiB .4756 .3417 .7733 .97 .01682 AlB .4756 .3417 .7733 .03 .01682 O1A .1856 .3390 .0562 .01900 O1B .5629 .3435 .7843 .01900 O2A .3119 .5031 .0477 .01900 O2B .4321 .4956 .7053 .01900 O3A .3028 .2363 -.1702 .01900 O3B .4503 .2082 .5758 .01900