Forsterite Muller-Sommer M, Hock R, Kirfel A Physics and Chemistry of Minerals 24 (1997) 17-23 Rietveld refinement study of the cation distribution in (Co, Mg)-olivine solid solution Sample: M75 _database_code_amcsd 0007978 4.7633 10.2290 5.9874 90 90 90 Pbnm atom x y z occ Biso CoM1 0 0 0 .372 .52 MgM1 0 0 0 .627 .52 CoM2 .9915 .2773 .25 .127 .41 MgM2 .9915 .2773 .25 .872 .41 Si .4274 .0943 .25 .34 O1 .7635 .0924 .25 .47 O2 .2170 .4507 .25 .47 O3 .2816 .1629 .0369 .51