data_global _chemical_name_mineral 'Olivine' loop_ _publ_author_name 'Muller-Sommer M' 'Hock R' 'Kirfel A' _journal_name_full 'Physics and Chemistry of Minerals' _journal_volume 24 _journal_year 1997 _journal_page_first 17 _journal_page_last 23 _publ_section_title ; Rietveld refinement study of the cation distribution in (Co, Mg)-olivine solid solution Sample: M00 ; _database_code_amcsd 0007972 _chemical_formula_sum 'Co2 Si O4' _cell_length_a 4.7825 _cell_length_b 10.3040 _cell_length_c 6.0041 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 295.875 _exptl_crystal_density_diffrn 4.713 _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_U_iso_or_equiv CoM1 0.00000 0.00000 0.00000 0.00659 CoM2 0.99190 0.27710 0.25000 0.00519 Si 0.42790 0.09640 0.25000 0.00431 O1 0.75780 0.09190 0.25000 0.00595 O2 0.21370 0.45160 0.25000 0.00595 O3 0.28790 0.16270 0.03320 0.00646