data_global _chemical_name_mineral 'Olivine' loop_ _publ_author_name 'Miyake M' 'Nakamura H' 'Kojima H' 'Marumo F' _journal_name_full 'American Mineralogist' _journal_volume 72 _journal_year 1987 _journal_page_first 594 _journal_page_last 598 _publ_section_title ; Cation ordering in Co-Mg olivine solid-solution series Sample: Co20 ; _database_code_amcsd 0001091 _chemical_formula_sum 'Co2 Si O4' _cell_length_a 4.781 _cell_length_b 10.296 _cell_length_c 5.998 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 295.253 _exptl_crystal_density_diffrn 4.723 _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 Co1 0.00000 0.00000 0.00000 Co2 0.99120 0.27650 0.25000 Si 0.42830 0.09490 0.25000 O1 0.76750 0.09180 0.25000 O2 0.21580 0.44860 0.25000 O3 0.28180 0.16410 0.03390 loop_ _atom_site_aniso_label _atom_site_aniso_U_11 _atom_site_aniso_U_22 _atom_site_aniso_U_33 _atom_site_aniso_U_12 _atom_site_aniso_U_13 _atom_site_aniso_U_23 Co1 0.00480 0.00680 0.00500 0.00000 -0.00060 -0.00100 Co2 0.00580 0.00510 0.00550 0.00010 0.00000 0.00000 Si 0.00350 0.00490 0.00440 0.00010 0.00000 0.00000 O1 0.00460 0.00640 0.00620 0.00000 0.00000 0.00000 O2 0.00620 0.00520 0.00690 0.00040 0.00000 0.00000 O3 0.00630 0.00790 0.00570 0.00090 -0.00070 0.00170