data_K2TaV
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.97
_cell_length_b   2.97
_cell_length_c   12.88
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   118.48
_symmetry_Int_Tables_number   1
_chemical_formula_structural   K2TaV
_chemical_formula_sum   'K2 Ta1 V1'
_cell_volume   99.96
_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  0.52  0.0  0.15  1.0
  K  K1  1  0.52  0.0  0.72  1.0
  Ta  Ta2  1  0.0  0.0  0.44  1.0
  V  V3  1  0.0  0.0  0.0  1.0

data_K2TaV
_symmetry_space_group_name_H-M   Cm
_cell_length_a   2.97
_cell_length_b   5.23
_cell_length_c   12.88
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   K2TaV
_chemical_formula_sum   'K4 Ta2 V2'
_cell_volume   199.99
_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
  K  K0  2  0.02  0.5  0.15  1.0
  K  K1  2  0.02  0.5  0.72  1.0
  Ta  Ta2  2  0.0  0.0  0.44  1.0
  V  V3  2  0.0  0.0  0.0  1.0

K K Ta V
K2TaV crystallizes in the triclinic P1 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 2-coordinate geometry to two equivalent Ta(1) and two equivalent V(1) atoms. There is one shorter (3.96 Å) and one longer (4.01 Å) K(1)-Ta(1) bond length. There is one shorter (2.41 Å) and one longer (2.48 Å) K(1)-V(1) bond length. In the second K site, K(2) is bonded in a distorted q6 geometry to six equivalent K(2), two equivalent Ta(1), and two equivalent V(1) atoms. There are four shorter (2.97 Å) and two longer (3.04 Å) K(2)-K(2) bond lengths. There is one shorter (3.96 Å) and one longer (4.01 Å) K(2)-Ta(1) bond length. There is one shorter (3.82 Å) and one longer (3.87 Å) K(2)-V(1) bond length. Ta(1) is bonded in a distorted q6 geometry to two equivalent K(1), two equivalent K(2), and six equivalent Ta(1) atoms. There are four shorter (2.97 Å) and two longer (3.04 Å) Ta(1)-Ta(1) bond lengths. V(1) is bonded in a 2-coordinate geometry to two equivalent K(1) and two equivalent K(2) atoms.