Liebenbergite Chen J, Li R, Parise J B, Weidner D J American Mineralogist 81 (1996) 1519-1522 Pressure-induced ordering in (Ni,Mg)2SiO4 olivine Sample: 4 GPa and 800 C, 109 min _database_code_amcsd 0001849 4.7322 10.1453 5.9309 90 90 90 Pbnm atom x y z occ Uiso Ni1 0 0 0 .762 .016 Mg1 0 0 0 .238 .016 Ni2 .9892 .2762 .25 .238 .016 Mg2 .9892 .2762 .25 .762 .016 Si .4260 .0939 .25 .017 O1 .7687 .0890 .25 .010 O2 .2259 .4450 .25 .010 O3 .2804 .1626 .0326 .010