data_2002459
_chemical_name_systematic          'Dibarium europium iridate(V)'
_chemical_formula_structural       'Ba2 Eu (Ir O6)'
_chemical_formula_sum              'Ba2 Eu Ir O6'
_publ_section_title
;
Ba2 Eu Ir O6 - Eine Kristallstrukturuntersuchung an einer 6L-
Perowskitstapelvariante
;
loop_
_publ_author_name
  'Lang, C'
  'Mueller-Buschbaum, Hk'
_journal_name_full                 'Journal of the Less-Common Metals'
_journal_volume                    161
_journal_year                      1990
_journal_page_first                1
_journal_page_last                 6
_cell_length_a                     5.9159(8)
_cell_length_b                     5.9159(8)
_cell_length_c                     14.744(4)
_cell_angle_alpha                  90
_cell_angle_beta                   90
_cell_angle_gamma                  120
_cell_volume                       446.9
_cell_formula_units_Z              3
_symmetry_space_group_name_H-M     'P 63/m m c'
_symmetry_Int_Tables_number        194
_symmetry_cell_setting             hexagonal
loop_
_symmetry_equiv_pos_as_xyz
  'x,y,z'
  '-y,x-y,z'
  'y-x,-x,z'
  '-y,-x,z'
  'y-x,y,z'
  'x,x-y,z'
  '-x,-y,-z'
  'y,y-x,-z'
  'x-y,x,-z'
  'y,x,-z'
  'x-y,-y,-z'
  '-x,y-x,-z'
  '-x,-y,1/2+z'
  'y,y-x,1/2+z'
  'x-y,x,1/2+z'
  'y,x,1/2+z'
  'x-y,-y,1/2+z'
  '-x,y-x,1/2+z'
  'x,y,1/2-z'
  '-y,x-y,1/2-z'
  'y-x,-x,1/2-z'
  '-y,-x,1/2-z'
  'y-x,y,1/2-z'
  'x,x-y,1/2-z'
loop_
_atom_type_symbol
_atom_type_oxidation_number
  Ba2+   2.000
  Ir5+   5.000
  Eu3+   3.000
  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
  Ba1   Ba2+   2 b 0. 0. 0.25 1.  0 d
  Ba2   Ba2+   4 f 0.3333 0.6667 0.0955(2) 1.  0 d
  Ir1   Ir5+   4 f 0.3333 0.6667 0.8366(1) 0.75  0 d
  Eu1   Eu3+   4 f 0.3333 0.6667 0.8366(1) 0.25  0 d
  Eu2   Eu3+   2 a 0. 0. 0. 1.  0 d
  O1    O2-    6 h 0.511(3) 0.022(7) 0.25 1.  0 d
  O2    O2-   12 k 0.823(3) 0.646(6) 0.087(1) 1.  0 d
_refine_ls_R_factor_all            0.053