data_global
_amcsd_formula_title 'Ba2Ta15O32'
loop_
_publ_author_name
'Siegrist T'
'Cava R J'
'Krajewski J J'
_journal_name_full 'Materials Research Bulletin'
_journal_volume 32 
_journal_year 1997
_journal_page_first 881
_journal_page_last 887
_publ_section_title
;
 Reduced alkaline earth tantalates
;
_database_code_amcsd 0014381
_chemical_formula_sum 'Ba2 Ta15 O32'
_cell_length_a 7.773
_cell_length_b 7.773
_cell_length_c 35.414
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 1853.032
_exptl_crystal_density_diffrn      9.412
_symmetry_space_group_name_H-M 'R -3'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '2/3+x,1/3+y,1/3+z'
  '1/3+x,2/3+y,2/3+z'
  'y,-x+y,-z'
  '2/3+y,1/3-x+y,1/3-z'
  '1/3+y,2/3-x+y,2/3-z'
  '-x+y,-x,z'
  '2/3-x+y,1/3-x,1/3+z'
  '1/3-x+y,2/3-x,2/3+z'
  '-x,-y,-z'
  '2/3-x,1/3-y,1/3-z'
  '1/3-x,2/3-y,2/3-z'
  '-y,x-y,z'
  '2/3-y,1/3+x-y,1/3+z'
  '1/3-y,2/3+x-y,2/3+z'
  'x-y,x,-z'
  '2/3+x-y,1/3+x,1/3-z'
  '1/3+x-y,2/3+x,2/3-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
Ba   0.00000   0.00000   0.36080   0.01520
Ta1   0.00000   0.00000   0.00000   0.00709
Ta2   0.26354   0.19279   0.26587   0.00570
Ta3   0.00000   0.00000   0.13866   0.00494
Ta4   0.21524   0.19221   0.46750   0.00393
O1   0.23430   0.20710   0.56850   0.00811
O2   0.24020   0.16610   0.83320   0.00519
O3   0.00000   0.00000   0.23720   0.00380
O4   0.23920   0.17590   0.10430   0.00950
O5   0.23280   0.17250   0.70670   0.00925
O6   0.20420  -0.01040   0.03150   0.01013