data_global
_amcsd_formula_title 'Cr7 Se8'
loop_
_publ_author_name
'Chevreton M'
'Bertaut F'
_journal_name_full 'Comptes Rendus Hebdomadaires des Seances de l'Academie des Sciences'
_journal_volume 253 
_journal_year 1961
_journal_page_first 145
_journal_page_last 147
_publ_section_title
;
 Etude de seleniures de chrome.
 _cod_database_code 1008922
;
_database_code_amcsd 0016789
_chemical_formula_sum 'Cr7 Se8'
_cell_length_a 12.664
_cell_length_b 7.374
_cell_length_c 11.979
_cell_angle_alpha 90
_cell_angle_beta 91.25
_cell_angle_gamma 90
_cell_volume 1118.385
_exptl_crystal_density_diffrn      5.913
_symmetry_space_group_name_H-M 'F 1 2/m 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x,1/2+y,1/2+z'
  '1/2+x,y,1/2+z'
  '1/2+x,1/2+y,z'
  'x,-y,z'
  'x,1/2-y,1/2+z'
  '1/2+x,-y,1/2+z'
  '1/2+x,1/2-y,z'
  '-x,y,-z'
  '-x,1/2+y,1/2-z'
  '1/2-x,y,1/2-z'
  '1/2-x,1/2+y,-z'
  '-x,-y,-z'
  '-x,1/2-y,1/2-z'
  '1/2-x,-y,1/2-z'
  '1/2-x,1/2-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Cr1   0.00000   0.50000   0.00000
Cr2   0.25000   0.25000   0.00000
Cr3   0.25000   0.24400   0.25000
Cr4   0.49400   0.00000   0.26800
Se1   0.17300   0.00000   0.12200
Se2   0.66900   0.00000   0.12600
Se3   0.42200   0.24000   0.13100