data_global
_amcsd_formula_title 'Fe2 O7 Sr Tb2'
loop_
_publ_author_name
'Samaras D'
'Collomb A'
'Joubert J'
_journal_name_full 'Journal of Solid State Chemistry'
_journal_volume 7 
_journal_year 1973
_journal_page_first 337
_journal_page_last 348
_publ_section_title
;
 Determination des structures de deux ferrite mixtes nouveaux de formule
 Ba La2 Fe2 O7 et Sr Tb2 Fe2 O7
 _cod_database_code 1008832
;
_database_code_amcsd 0016701
_chemical_formula_sum 'Sr Tb2 Fe2 O7'
_cell_length_a 5.5065
_cell_length_b 5.5065
_cell_length_c 19.659
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 596.091
_exptl_crystal_density_diffrn      7.011
_symmetry_space_group_name_H-M 'P 42/m n m'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '-y,-x,z'
  'y,x,-z'
  '1/2+y,1/2-x,1/2-z'
  '1/2-y,1/2+x,1/2+z'
  '1/2+x,1/2-y,1/2+z'
  '1/2-x,1/2+y,1/2-z'
  'x,y,-z'
  '-x,-y,z'
  'y,x,z'
  '-y,-x,-z'
  '1/2-y,1/2+x,1/2-z'
  '1/2+y,1/2-x,1/2+z'
  '1/2-x,1/2+y,1/2+z'
  '1/2+x,1/2-y,1/2-z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Sr1   0.26400   0.26400   0.00000
Tb1   0.27600   0.27600   0.18230
Fe1   0.24800   0.24800   0.40060
O1   0.78400   0.78400   0.50000
O2   0.20700   0.20700   0.28500
O3   0.00000   0.50000   0.12600
O4   0.00000   0.00000   0.10800
O5   0.00000   0.00000   0.40800