data_2002354
_chemical_name_systematic          'Barium dimagnesium divanadium(V)oxide'
_chemical_formula_structural       'Ba Mg2 V2 O8'
_chemical_formula_sum              'Ba Mg2 O8 V2'
_publ_section_title
;
Neue Verbindungen mit Sr Ni2 V2 O8-Struktur: Ba Co2 V2 O8 und Ba Mg2 V2
O8
;
loop_
_publ_author_name
  'Wichmann, R'
  'Mueller-Buschbaum, Hk'
_journal_name_full
;
Zeitschrift fuer Anorganische und Allgemeine Chemie
;
_journal_volume                    534
_journal_year                      1986
_journal_page_first                153
_journal_page_last                 158
_cell_length_a                     12.4189(8)
_cell_length_b                     12.4189(8)
_cell_length_c                     8.4657(17)
_cell_angle_alpha                  90
_cell_angle_beta                   90
_cell_angle_gamma                  90
_cell_volume                       1305.7
_cell_formula_units_Z              8
_symmetry_space_group_name_H-M     'I 41/a c d Z'
_symmetry_Int_Tables_number        142
_symmetry_cell_setting             tetragonal
loop_
_symmetry_equiv_pos_as_xyz
  'x,y,z'
  '-x,y,1/2+z'
  '1/4+y,1/4+x,1/4+z'
  '3/4-y,1/4+x,3/4+z'
  '-x,-y,-z'
  'x,-y,1/2-z'
  '3/4-y,3/4-x,3/4-z'
  '1/4+y,3/4-x,1/4-z'
  'x,1/2-y,1/2+z'
  '-x,1/2-y,z'
  '1/4+y,1/4-x,3/4+z'
  '3/4-y,1/4-x,1/4+z'
  '-x,1/2+y,1/2-z'
  'x,1/2+y,-z'
  '3/4-y,3/4+x,1/4-z'
  '1/4+y,3/4+x,3/4-z'
  '1/2+x,1/2+y,1/2+z'
  '1/2-x,1/2+y,z'
  '3/4+y,3/4+x,3/4+z'
  '1/4-y,3/4+x,1/4+z'
  '1/2-x,1/2-y,1/2-z'
  '1/2+x,1/2-y,-z'
  '1/4-y,1/4-x,1/4-z'
  '3/4+y,1/4-x,3/4-z'
  '1/2+x,-y,z'
  '1/2-x,-y,1/2+z'
  '3/4+y,3/4-x,1/4+z'
  '1/4-y,3/4-x,3/4+z'
  '1/2-x,y,-z'
  '1/2+x,y,1/2-z'
  '1/4-y,1/4+x,3/4-z'
  '3/4+y,1/4+x,1/4-z'
loop_
_atom_type_symbol
_atom_type_oxidation_number
  Ba2+   2.000
  V5+    5.000
  Mg2+   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
  Ba1   Ba2+   8 a 0. 0.25 0.375 1.  0 d
  V1    V5+   16 e 0.0810(2) 0. 0.25 1.  0 d
  Mg1   Mg2+  16 f 0.1682 0.4182 0.125 1.  0 d
  O1    O2-   32 g 0.158(1) 0.074(1) 0.384(1) 1.  0 d
  O2    O2-   32 g 0.499(1) 0.087(1) 0.346(1) 1.  0 d
_refine_ls_R_factor_all            0.05