data_global _chemical_name_mineral 'Srebrodolskite' loop_ _publ_author_name 'Bertaut F' 'Blum P' 'Sagnieres A' _journal_name_full 'Comptes Rendus Hebdomadaires des Seances de l'Academie des Sciences' _journal_volume 246 _journal_year 1958 _journal_page_first 658 _journal_page_last 658 _publ_section_title ; La structure du ferrite dicalcique et de la brownmillerite, aussi bien que 'Errata'. _cod_database_code 1008778 ; _database_code_amcsd 0016654 _chemical_formula_sum 'Ca2 Fe2 O5' _cell_length_a 5.64 _cell_length_b 14.68 _cell_length_c 5.39 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 446.266 _exptl_crystal_density_diffrn 4.046 _symmetry_space_group_name_H-M 'P c m n' loop_ _space_group_symop_operation_xyz 'x,y,z' 'x,1/2-y,z' '-x,1/2+y,-z' '1/2+x,1/2+y,1/2-z' '1/2-x,1/2-y,1/2+z' '1/2-x,y,1/2+z' '1/2+x,-y,1/2-z' '-x,-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z Ca 0.02800 0.11200 0.48000 Fe1 0.00000 0.00000 0.00000 Fe2 -0.07200 0.25000 -0.05500 O1 0.25000 -0.01500 0.25000 O2 0.05500 0.13300 0.00000 O3 -0.14300 0.25000 0.63000