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 = 300 C, on cooling
_database_code_amcsd 0002721
4.75898 10.2340 5.98423 90 90 90 Pbnm
atom     x     y     z  occ Biso
Ni1      0     0     0 .349 0.58
Mg1      0     0     0 .651 0.58
Ni2  .9910 .2775   .25 .051 0.63
Mg2  .9910 .2775   .25 .949 0.63
Si   .4259 .0937   .25      0.37
O1   .7664 .0926   .25      0.60
O2   .2222 .4474   .25      0.60
O3   .2763 .1625 .0332      0.64