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: Mg50Ni50 at T = 1100 C _database_code_amcsd 0002697 4.78795 10.3296 6.02598 90 90 90 Pbnm atom x y z occ Biso Ni1 0 0 0 .702 1.53 Mg1 0 0 0 .298 1.53 Ni2 .9890 .2776 .25 .298 1.69 Mg2 .9890 .2776 .25 .702 1.69 Si .4254 .0922 .25 1.03 O1 .7660 .0939 .25 1.61 O2 .2217 .4484 .25 1.55 O3 .2765 .1616 .0337 1.52