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 = 20 C _database_code_amcsd 0009057 18.2429 8.8171 5.1894 90 90 90 Pbca atom x y z occ Uiso MgM1 .3780 .6514 .8714 .967 .00695 FeM1 .3780 .6514 .8714 .023 .00695 MgM2 .3754 .4879 .3508 .853 .01089 FeM2 .3754 .4879 .3508 .127 .01089 SiA .2700 .3468 .0527 .00153 SiB .4724 .3370 .7975 .97 .00153 AlB .4724 .3370 .7975 .03 .00153 O1A .1840 .3305 .0362 .00218 O1B .5618 .3462 .7963 .00218 O2A .3092 .5042 .0396 .00218 O2B .4318 .4895 .6888 .00218 O3A .3036 .2281 -.1686 .00218 O3B .4478 .1967 .6015 .00218