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: Mg80Ni20 at T = 25 C, on cooling
_database_code_amcsd 0002722
4.74737 10.2069 5.96790 90 90 90 Pbnm
atom     x     y     z  occ Biso
Ni1      0     0     0 .349 0.32
Mg1      0     0     0 .651 0.32
Ni2  .9908 .2767   .25 .051 0.34
Mg2  .9908 .2767   .25 .949 0.34
Si   .4256 .0937   .25      0.21
O1   .7666 .0926   .25      0.35
O2   .2219 .4467   .25      0.38
O3   .2765 .1627 .0324      0.37