Forsterite
Ottonello G, Della Giusta A, Molin G M
American Mineralogist 74 (1989) 411-421
Cation ordering in Ni-Mg olivines
sample Ni.30A, synthesized at 902 C, then quenched
Mg1.4Ni.6SiO4
_database_code_amcsd 0001219
4.7466 10.2003 5.9556 90 90 90 Pbnm
atom     x     y     z  occ Biso
Ni1      0     0     0 .533 0.60
Mg1      0     0     0 .467 0.60
Ni2  .9904 .2762   .25 .065 0.64
Mg2  .9904 .2762   .25 .935 0.64
Si   .4258 .0936   .25      0.53
O1   .7669 .0925   .25      0.62
O2   .2196 .4464   .25      0.63
O3   .2765 .1626 .0323      0.66