data_1006163
_chemical_name_systematic          'Diytterbium barium cobalt oxide'
_chemical_formula_structural       'Yb2 Ba Co O5'
_chemical_formula_sum              'Ba Co O5 Yb2'
_publ_section_title
;
Yb2 Ba Co O5 magnetic and crystal structure determination from neutron
scattering
;
loop_
_publ_author_name
  'Hernandez-Velasco, J'
  'Saez-Puche, R'
  'Rodriguez-Carvajal, J'
_journal_name_full                 'Journal of Alloys Compd.'
_journal_coden_ASTM                JALCEU
_journal_volume                    275
_journal_year                      1998
_journal_page_first                651
_journal_page_last                 656
_cell_length_a                     12.1745(2)
_cell_length_b                     5.6594(1)
_cell_length_c                     6.9993(1)
_cell_angle_alpha                  90
_cell_angle_beta                   90
_cell_angle_gamma                  90
_cell_volume                       482.3
_cell_formula_units_Z              4
_symmetry_space_group_name_H-M     'P n m a'
_symmetry_Int_Tables_number        62
_symmetry_cell_setting             orthorhombic
loop_
_symmetry_equiv_pos_as_xyz
  'x,y,z'
  '1/2+x,1/2-y,1/2-z'
  '-x,1/2+y,-z'
  '1/2-x,-y,1/2+z'
  '-x,-y,-z'
  '1/2-x,1/2+y,1/2+z'
  'x,1/2-y,z'
  '1/2+x,y,1/2-z'
loop_
_atom_type_symbol
_atom_type_oxidation_number
  Yb3+   3.000
  Co2+   2.000
  Ba2+   2.000
  O2-   -2.000
loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_symmetry_multiplicity
_atom_site_Wyckoff_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_attached_hydrogens
_atom_site_calc_flag
  Yb1   Yb3+   4 c 0.2912(2) 0.25 0.1203(4) 1.  0 d
  Yb2   Yb3+   4 c 0.0740(2) 0.25 0.3994(3) 1.  0 d
  Co1   Co2+   4 c 0.6545(9) 0.25 0.6934(11) 1.  0 d
  Ba1   Ba2+   4 c 0.9016(4) 0.25 0.9256(8) 1.  0 d
  O1    O2-    8 d 0.4347(3) -0.0037(7) 0.1669(4) 1.  0 d
  O2    O2-    8 d 0.2255(3) 0.4976(7) 0.3620(5) 1.  0 d
  O3    O2-    4 c 0.1042(4) 0.25 0.0783(8) 1.  0 d
_refine_ls_R_factor_all            0.025