data_global
_chemical_name_mineral 'Srebrodolskite'
loop_
_publ_author_name
'Berggren J'
_journal_name_full 'Acta Chemica Scandinavica'
_journal_volume 25 
_journal_year 1971
_journal_page_first 3616
_journal_page_last 3624
_publ_section_title
;
 Refinement of the crystal structure of dicalcium ferrite, Ca2Fe2O5
;
_database_code_amcsd 0011930
_chemical_formula_sum 'Ca2 Fe2 O5'
_cell_length_a 5.4253
_cell_length_b 14.7687
_cell_length_c 5.5980
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 448.538
_exptl_crystal_density_diffrn      4.026
_symmetry_space_group_name_H-M 'P n m a'
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   0.48170   0.10800   0.02310
Fe1   0.00000   0.00000   0.00000
Fe2  -0.05410   0.25000  -0.06590
O1   0.26230  -0.01540   0.23770
O2   0.02240   0.14060   0.07150
O3   0.59810   0.25000  -0.12430
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
Ca 0.01327 0.01215 0.01048 -0.00101 0.00208 0.00021
Fe1 0.00656 0.01547 0.00714 0.00020 -0.00015 0.00042
Fe2 0.00790 0.01105 0.00873 0.00000 -0.00008 0.00000
O1 0.01327 0.01989 0.00841 -0.00020 -0.00308 0.00126
O2 0.01789 0.01436 0.01365 0.00101 0.00008 0.00126
O3 0.01103 0.01768 0.01127 0.00000 -0.00108 0.00000