data_global _chemical_name_mineral 'Forsterite' loop_ _publ_author_name 'Artioli G' 'Rinaldi R' 'Wilson C C' 'Zanazzi P F' _journal_name_full 'American Mineralogist' _journal_volume 80 _journal_year 1995 _journal_page_first 197 _journal_page_last 200 _publ_section_title ; High-temperature Fe-Mg cation partitioning in olivine: In-situ single-crystal neutron diffraction study T = 880 C Atomic parameters obtained from the ICSD ; _database_code_amcsd 0001719 _chemical_formula_sum '(Mg1.76 Fe.24) Si O4' _cell_length_a 4.76 _cell_length_b 10.33 _cell_length_c 6.05 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 297.483 _exptl_crystal_density_diffrn 3.310 _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 Mg1 0.00000 0.00000 0.00000 0.86800 Fe1 0.00000 0.00000 0.00000 0.13200 Mg2 0.99220 0.27820 0.25000 0.89200 Fe2 0.99220 0.27820 0.25000 0.10800 Si 0.42660 0.09440 0.25000 1.00000 O1 0.76710 0.09130 0.25000 1.00000 O2 0.22030 0.45040 0.25000 1.00000 O3 0.28130 0.16300 0.03560 1.00000 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 Mg1 0.03030 0.02290 0.01970 0.00220 -0.00500 -0.00230 Fe1 0.03030 0.02290 0.01970 0.00220 -0.00500 -0.00230 Mg2 0.02510 0.01410 0.02520 0.00290 0.00000 0.00000 Fe2 0.02510 0.01410 0.02520 0.00290 0.00000 0.00000 Si 0.00580 0.00810 0.01940 0.00370 0.00000 0.00000 O1 0.01390 0.02010 0.01960 0.00710 0.00000 0.00000 O2 0.01170 0.00900 0.02920 -0.00240 0.00000 0.00000 O3 0.02030 0.01700 0.01960 -0.00190 -0.00350 0.00890