Forsterite Heuer M Journal of Applied Crystallography 34 (2001) 271-279 The determination of site occupancies using a new strategy in Rietveld refinements Note: results of the conventional Rietveld refinement on the whole data set Locality: synthetic _database_code_amcsd 0020681 4.76450 10.23467 5.99727 90 90 90 Pbnm atom x y z occ Biso MgM1 0 0 0 .877 .90 FeM1 0 0 0 .123 .90 MgM2 .9878 .2773 .25 .893 .97 FeM2 .9878 .2773 .25 .107 .97 Si .4274 .0944 .25 .78 O1 .7648 .0901 .25 .42 O2 .2227 .4498 .25 .42 O3 .2815 .1610 .0392 .42