data_global _chemical_name_mineral 'Forsterite' loop_ _publ_author_name 'Nord A G' 'Annersten H' 'Filippidis A' _journal_name_full 'American Mineralogist' _journal_volume 67 _journal_year 1982 _journal_page_first 1206 _journal_page_last 1211 _publ_section_title ; The cation distribution in synthetic Mg-Fe-Ni olivines sample H4 ; _database_code_amcsd 0000886 _chemical_compound_source 'Synthetic' _chemical_formula_sum '(Ni.9 Mg1.02 Fe.08) Si O4' _cell_length_a 4.747 _cell_length_b 10.193 _cell_length_c 5.951 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 287.946 _exptl_crystal_density_diffrn 4.017 _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 Ni1 0.00000 0.00000 0.00000 0.68000 0.01140 Mg1 0.00000 0.00000 0.00000 0.30000 0.01140 Fe1 0.00000 0.00000 0.00000 0.02000 0.01140 Mg2 0.98600 0.27700 0.25000 0.72000 0.01140 Fe2 0.98600 0.27700 0.25000 0.06000 0.01140 Ni2 0.98600 0.27700 0.25000 0.22000 0.01140 Si 0.42600 0.09600 0.25000 1.00000 -0.00380 O1 0.77900 0.10100 0.25000 1.00000 -0.00380 O2 0.20700 0.45800 0.25000 1.00000 -0.00380 O3 0.26500 0.16700 0.03500 1.00000 -0.00380