Periclase Merli M, Pavese A, Ranzini M Physics and Chemistry of Minerals 29 (2002) 455-464 Study of the electron density in MgO, (Mg0.963Fe0.037)O and Cu2O by the maximum entropy method and multipole refinements: comparison between methods Sample: multipole refinement _database_code_amcsd 0008644 4.2163 4.2163 4.2163 90 90 90 Fm-3m atom x y z occ Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) Mg 0 0 0 .963 .0046 .0046 .0046 .0046 0 0 0 Fe 0 0 0 .037 .0046 .0046 .0046 .0046 0 0 0 O 0 .5 .5 .0035 .0035 .0035 .0035 0 0 0