Liebenbergite Ottonello G, Della Giusta A, Molin G M American Mineralogist 74 (1989) 411-421 Cation ordering in Ni-Mg olivines sample Ni.75, heated to 1150 C, then quenched Mg.505Ni1.492SiO4 _database_code_amcsd 0001228 4.7350 10.1526 5.9278 90 90 90 Pbnm atom x y z occ Biso Ni1 0 0 0 .87 0.43 Mg1 0 0 0 .13 0.43 Ni2 .9918 .2745 .25 .59 0.45 Mg2 .9918 .2745 .25 .41 0.45 Si .4267 .0938 .25 0.46 O1 .7684 .0929 .25 0.47 O2 .2198 .4449 .25 0.57 O3 .2750 .1630 .0319 0.52