data_K2BaTa
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.14
_cell_length_b   10.14
_cell_length_c   10.14
_cell_angle_alpha   160.35
_cell_angle_beta   147.47
_cell_angle_gamma   38.29
_symmetry_Int_Tables_number   1
_chemical_formula_structural   K2BaTa
_chemical_formula_sum   'K2 Ba1 Ta1'
_cell_volume   188.29
_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
  K  K1  1  0.0  0.84  0.22  1.0
  K  K2  1  0.73  0.0  0.36  1.0
  Ba  Ba0  1  0.0  0.0  0.0  1.0
  Ta  Ta3  1  0.0  0.0  0.58  1.0

data_K2BaTa
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.46
_cell_length_b   5.68
_cell_length_c   10.14
_cell_angle_alpha   106.26
_cell_angle_beta   99.83
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   K2BaTa
_chemical_formula_sum   'K2 Ba1 Ta1'
_cell_volume   188.29
_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
  K  K0  1  0.0  0.36  0.63  1.0
  K  K1  1  0.16  0.38  0.38  1.0
  Ba  Ba2  1  0.0  0.0  0.0  1.0
  Ta  Ta3  1  0.0  0.58  0.58  1.0

K K Ba Ta
K2BaTa crystallizes in the triclinic P1 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a single-bond geometry to one Ba(1) and one Ta(1) atom. The K(1)-Ba(1) bond length is 3.80 Å. The K(1)-Ta(1) bond length is 2.18 Å. In the second K site, K(2) is bonded in a single-bond geometry to two equivalent Ba(1) and one Ta(1) atom. There is one shorter (4.44 Å) and one longer (4.76 Å) K(2)-Ba(1) bond length. The K(2)-Ta(1) bond length is 1.47 Å. Ba(1) is bonded in a distorted hexagonal planar geometry to one K(1), two equivalent K(2), two equivalent Ba(1), and one Ta(1) atom. Both Ba(1)-Ba(1) bond lengths are 3.46 Å. The Ba(1)-Ta(1) bond length is 4.27 Å. Ta(1) is bonded in a 2-coordinate geometry to one K(1), one K(2), and one Ba(1) atom.