data_global _chemical_name_mineral 'Bridgmanite' loop_ _publ_author_name 'Jephcoat A P' 'Hriljac J A' 'McCammon C A' 'O'Neill H St C' 'Rubie D C' 'Finger L W' _journal_name_full 'American Mineralogist' _journal_volume 84 _journal_year 1999 _journal_page_first 214 _journal_page_last 220 _publ_section_title ; High-resolution synchrotron X-ray powder diffraction and Rietveld structure refinement of two (Mg.95,Fe.05)SiO3 perovskite samples synthesized under different oxygen fugacity conditions Sample PV-A ; _database_code_amcsd 0002090 _chemical_compound_source 'Synthetic' _chemical_formula_sum '(Mg.95 Fe.05) Si O3' _cell_length_a 4.7839 _cell_length_b 4.9294 _cell_length_c 6.9000 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 162.714 _exptl_crystal_density_diffrn 4.162 _symmetry_space_group_name_H-M 'P b n m' loop_ _space_group_symop_operation_xyz 'x,y,z' 'x,y,1/2-z' '-x,-y,1/2+z' '1/2+x,1/2-y,1/2+z' '1/2-x,1/2+y,1/2-z' '1/2-x,1/2+y,z' '1/2+x,1/2-y,-z' '-x,-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_occupancy _atom_site_U_iso_or_equiv Mg 0.50680 0.55570 0.25000 0.95000 0.00610 Fe 0.50680 0.55570 0.25000 0.05000 0.00610 Si 0.50000 0.00000 0.50000 1.00000 0.00420 O1 0.10320 0.46140 0.25000 1.00000 0.00400 O2 0.19330 0.20310 0.54720 1.00000 0.00430