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: M87 _database_code_amcsd 0007979 4.7585 10.2148 5.9846 90 90 90 Pbnm atom x y z occ Biso CoM1 0 0 0 .193 .52 MgM1 0 0 0 .806 .52 CoM2 .9916 .2771 .25 .056 .41 MgM2 .9916 .2771 .25 .943 .41 Si .4276 .0933 .25 .34 O1 .7624 .0939 .25 .47 O2 .2187 .4515 .25 .47 O3 .2804 .1634 .0376 .51