Forsterite Henderson C M B, Redfern S A T, Smith R I, Knight K S, Charnock J M American Mineralogist 86 (2001) 1170-1187 Composition and temperature dependence of cation ordering in Ni-Mg olivine solid solutions: A time-of-flight neutron powder diffraction and EXAFS study Sample: Mg75Ni25 at room temperature _database_code_amcsd 0002676 4.7473 10.196 5.9597 90 90 90 Pbnm atom x y z occ Biso Ni1 0 0 0 .424 0.39 Mg1 0 0 0 .576 0.39 Ni2 .9908 .2765 .25 .076 0.45 Mg2 .9908 .2765 .25 .924 0.45 Si .4256 .0937 .25 0.26 O1 .7670 .0927 .25 0.42 O2 .2208 .4464 .25 0.45 O3 .2763 .1627 .0325 0.45