data_Ba2AlTe
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.2
_cell_length_b   6.2
_cell_length_c   6.2
_cell_angle_alpha   126.47
_cell_angle_beta   126.47
_cell_angle_gamma   79.12
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ba2AlTe
_chemical_formula_sum   'Ba2 Al1 Te1'
_cell_volume   149.04
_cell_formula_units_Z   1
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  Ba1  1  0.79  0.0  0.39  1.0
  Ba  Ba2  1  0.0  0.79  0.39  1.0
  Al  Al0  1  0.0  0.0  0.0  1.0
  Te  Te3  1  0.0  0.0  0.78  1.0

data_Ba2AlTe
_symmetry_space_group_name_H-M   Cm
_cell_length_a   7.9
_cell_length_b   7.9
_cell_length_c   6.2
_cell_angle_alpha   90.0
_cell_angle_beta   129.56
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Ba2AlTe
_chemical_formula_sum   'Ba4 Al2 Te2'
_cell_volume   298.09
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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  4  0.01  0.4  0.4  1.0
  Al  Al1  2  0.0  0.0  0.0  1.0
  Te  Te2  2  0.22  0.0  0.22  1.0

Ba Ba Al Te
Ba Ba Al Te 0 1 + - o 0 3 + o o 1 3 o + o 2 3 o o - 
Ba2AlTe is Copper structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two Ba2AlTe clusters. Ba(1) is bonded in a 1-coordinate geometry to one Te(1) atom. The Ba(1)-Te(1) bond length is 1.95 Å. Al(1) is bonded in a single-bond geometry to one Te(1) atom. The Al(1)-Te(1) bond length is 1.37 Å. Te(1) is bonded in a 3-coordinate geometry to two equivalent Ba(1) and one Al(1) atom.