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: P3 Rietveld, 30.6% olivine _database_code_amcsd 0005399 4.7654 10.2396 5.9984 90 90 90 Pbnm atom x y z occ Biso Si .427 .095 .25 .39 MgM1 0 0 0 .872 .40 FeM1 0 0 0 .128 .40 MgM2 .990 .278 .25 .900 .41 FeM2 .990 .278 .25 .100 .41 O1 .769 .095 .25 .50 O2 .207 .445 .25 .48 O3 .276 .164 .030 .52