Forsterite Liang J, Hawthorne F C The Canadian Mineralogist 32 (1994) 541-552 Characterization of fine-grained mixtures of rock-forming minerals by Rietveld structure refinement: olivine + pyroxene Sample: P8 Rietveld, 79.9% olivine _database_code_amcsd 0005404 4.7659 10.2396 5.9993 90 90 90 Pbnm atom x y z occ Biso Si .428 .095 .25 .39 MgM1 0 0 0 .910 .40 FeM1 0 0 0 .090 .40 MgM2 .990 .2774 .25 .900 .41 FeM2 .990 .2774 .25 .100 .41 O1 .767 .090 .25 .50 O2 .216 .446 .25 .48 O3 .279 .162 .030 .52