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 = 650 C, on cooling
_database_code_amcsd 0002700
4.76655 10.2694 5.99104 90 90 90 Pbnm
atom     x     y     z  occ Biso
Ni1      0     0     0 .746 0.96
Mg1      0     0     0 .254 0.96
Ni2  .9905 .2769   .25 .254 1.02
Mg2  .9905 .2769   .25 .746 1.02
Si   .4254 .0931   .25      0.61
O1   .7671 .0934   .25      0.98
O2   .2213 .4468   .25      1.00
O3   .2757 .1619 .0329      1.01