data_global
_amcsd_formula_title 'Al2 Ba O4'
loop_
_publ_author_name
'Wallmark S'
'Westgren A'
_journal_name_full 'Arkiv for Kemi, Mineralogi och Geologi'
_journal_volume B12 
_journal_year 1937
_journal_page_first 1
_journal_page_last 4
_publ_section_title
;
 X-Ray Analysis of Barium Aluminates
 _cod_database_code 1010039
;
_database_code_amcsd 0016975
_chemical_formula_sum 'Ba Al2 O4'
_cell_length_a 5.209
_cell_length_b 5.209
_cell_length_c 8.761
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 205.870
_exptl_crystal_density_diffrn      4.118
_symmetry_space_group_name_H-M 'P 63 2 2'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x,x-y,1/2-z'
  'x-y,x,1/2+z'
  'y,x,-z'
  '-y,x-y,z'
  '-x+y,y,1/2-z'
  '-x,-y,1/2+z'
  '-x,-x+y,-z'
  '-x+y,-x,z'
  '-y,-x,1/2-z'
  'y,-x+y,1/2+z'
  'x-y,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Ba1   0.00000   0.00000   0.25000
Al1   0.33333   0.66667   0.05000
O1   0.33333   0.66667   0.25000
O2   0.66667   0.00000   0.00000