data_global _chemical_name_mineral 'Fayalite' loop_ _publ_author_name 'Hazen R M' _journal_name_full 'American Mineralogist' _journal_volume 62 _journal_year 1977 _journal_page_first 286 _journal_page_last 295 _publ_section_title ; Effects of temperature and pressure on the crystal structure of ferromagnesian olivine T = 900 deg C,P = 1 atm ; _database_code_amcsd 0000573 _chemical_compound_source 'Franklin, New Jersey, USA' _chemical_formula_sum '(Fe1.1 Mg.75 Mn.15) Si O4' _cell_length_a 4.838 _cell_length_b 10.490 _cell_length_c 6.136 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 311.406 _exptl_crystal_density_diffrn 3.839 _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 Fe1 0.00000 0.00000 0.00000 0.56200 0.03002 Mg1 0.00000 0.00000 0.00000 0.36100 0.03002 Mn1 0.00000 0.00000 0.00000 0.07700 0.03002 Fe2 0.99400 0.27990 0.25000 0.53800 0.02140 Mg2 0.99400 0.27990 0.25000 0.38900 0.02140 Mn2 0.99400 0.27990 0.25000 0.07300 0.02140 Si 0.44500 0.09590 0.25000 1.00000 0.01343 O1 0.81400 0.08820 0.25000 1.00000 0.03344 O2 0.21000 0.45030 0.25000 1.00000 0.01127 O3 0.28000 0.16150 0.04470 1.00000 0.02330