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 = 150 C _database_code_amcsd 0009068 18.2513 8.8274 5.1929 90 90 90 Pbca atom x y z occ Uiso MgM1 .3793 .6526 .8682 .972 .00709 FeM1 .3793 .6526 .8682 .018 .00709 MgM2 .3745 .4876 .3531 .848 .00974 FeM2 .3745 .4876 .3531 .132 .00974 SiA .2694 .3475 .0505 .00361 SiB .4729 .3354 .7952 .97 .00361 AlB .4729 .3354 .7952 .03 .00361 O1A .1832 .3374 .0381 .00447 O1B .5617 .3426 .7963 .00447 O2A .3094 .5056 .0372 .00447 O2B .4318 .4858 .6893 .00447 O3A .3044 .2255 -.1702 .00447 O3B .4474 .1976 .6020 .00447