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: P4 Rietveld, 39.7% olivine _database_code_amcsd 0005400 4.7652 10.2388 5.9992 90 90 90 Pbnm atom x y z occ Biso Si .428 .095 .25 .39 MgM1 0 0 0 .918 .40 FeM1 0 0 0 .082 .40 MgM2 .990 .278 .25 .898 .41 FeM2 .990 .278 .25 .102 .41 O1 .768 .092 .25 .50 O2 .217 .443 .25 .48 O3 .273 .163 .032 .52