The material structure described by Ba3Te2O9 crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 12-coordinate geometry to three equivalent O(2) and nine equivalent O(1) atoms. In the second Ba site, Ba(2) is bonded to six equivalent O(1) and six equivalent O(2) atoms to form BaO12 cuboctahedra that share corners with six equivalent Ba(2)O12 cuboctahedra and faces with six equivalent Te(1)O6 octahedra. Te(1) is bonded to three equivalent O(1) and three equivalent O(2) atoms to form distorted TeO6 octahedra that share faces with three equivalent Ba(2)O12 cuboctahedra and  a faceface with one Te(1)O6 octahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Ba(2), three equivalent Ba(1), and one Te(1) atom. In the second O site, O(2) is bonded in a distorted L-shaped geometry to two equivalent Ba(1), two equivalent Ba(2), and two equivalent Te(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ba3Te2O9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.896
_cell_length_b   5.896
_cell_length_c   14.375
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   432.801
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Ba  Ba0  1  0.333  0.667  0.438  1.0
  Ba  Ba1  1  0.667  0.333  0.939  1.0
  Ba  Ba2  1  0.667  0.333  0.561  1.0
  Ba  Ba3  1  0.333  0.667  0.062  1.0
  Ba  Ba4  1  0.667  0.333  0.250  1.0
  Ba  Ba5  1  0.333  0.667  0.750  1.0
  Te  Te6  1  0.000  0.000  0.350  1.0
  Te  Te7  1  0.000  0.000  0.850  1.0
  Te  Te8  1  0.000  0.000  0.650  1.0
  Te  Te9  1  1.000  1.000  0.150  1.0
  O  O10  1  0.837  0.163  0.409  1.0
  O  O11  1  0.837  0.674  0.409  1.0
  O  O12  1  0.326  0.163  0.409  1.0
  O  O13  1  0.674  0.837  0.909  1.0
  O  O14  1  0.163  0.326  0.591  1.0
  O  O15  1  0.163  0.837  0.909  1.0
  O  O16  1  0.163  0.326  0.909  1.0
  O  O17  1  0.837  0.163  0.091  1.0
  O  O18  1  0.326  0.163  0.091  1.0
  O  O19  1  0.674  0.837  0.591  1.0
  O  O20  1  0.142  0.284  0.250  1.0
  O  O21  1  0.858  0.142  0.750  1.0
  O  O22  1  0.284  0.142  0.750  1.0
  O  O23  1  0.716  0.858  0.250  1.0
  O  O24  1  0.142  0.858  0.250  1.0
  O  O25  1  0.858  0.716  0.750  1.0
  O  O26  1  0.837  0.674  0.091  1.0
  O  O27  1  0.163  0.837  0.591  1.0
[/CIF]
.
The material structure described by Ba3Te2O9 crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 12-coordinate geometry to three equivalent O(2) and nine equivalent O(1) atoms. In the second Ba site, Ba(2) is bonded to six equivalent O(1) and six equivalent O(2) atoms to form BaO12 cuboctahedra that share corners with six equivalent Ba(2)O12 cuboctahedra and faces with six equivalent Te(1)O6 octahedra. Te(1) is bonded to three equivalent O(1) and three equivalent O(2) atoms to form distorted TeO6 octahedra that share faces with three equivalent Ba(2)O12 cuboctahedra and  a faceface with one Te(1)O6 octahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Ba(2), three equivalent Ba(1), and one Te(1) atom. In the second O site, O(2) is bonded in a distorted L-shaped geometry to two equivalent Ba(1), two equivalent Ba(2), and two equivalent Te(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ba3Te2O9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.896
_cell_length_b   5.896
_cell_length_c   14.375
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   432.801
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Ba  Ba0  1  0.333  0.667  0.438  1.0
  Ba  Ba1  1  0.667  0.333  0.939  1.0
  Ba  Ba2  1  0.667  0.333  0.561  1.0
  Ba  Ba3  1  0.333  0.667  0.062  1.0
  Ba  Ba4  1  0.667  0.333  0.250  1.0
  Ba  Ba5  1  0.333  0.667  0.750  1.0
  Te  Te6  1  0.000  0.000  0.350  1.0
  Te  Te7  1  0.000  0.000  0.850  1.0
  Te  Te8  1  0.000  0.000  0.650  1.0
  Te  Te9  1  1.000  1.000  0.150  1.0
  O  O10  1  0.837  0.163  0.409  1.0
  O  O11  1  0.837  0.674  0.409  1.0
  O  O12  1  0.326  0.163  0.409  1.0
  O  O13  1  0.674  0.837  0.909  1.0
  O  O14  1  0.163  0.326  0.591  1.0
  O  O15  1  0.163  0.837  0.909  1.0
  O  O16  1  0.163  0.326  0.909  1.0
  O  O17  1  0.837  0.163  0.091  1.0
  O  O18  1  0.326  0.163  0.091  1.0
  O  O19  1  0.674  0.837  0.591  1.0
  O  O20  1  0.142  0.284  0.250  1.0
  O  O21  1  0.858  0.142  0.750  1.0
  O  O22  1  0.284  0.142  0.750  1.0
  O  O23  1  0.716  0.858  0.250  1.0
  O  O24  1  0.142  0.858  0.250  1.0
  O  O25  1  0.858  0.716  0.750  1.0
  O  O26  1  0.837  0.674  0.091  1.0
  O  O27  1  0.163  0.837  0.591  1.0
[/CIF]
.