data_KTe2Pb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.86
_cell_length_b   5.86
_cell_length_c   5.86
_cell_angle_alpha   123.96
_cell_angle_beta   123.96
_cell_angle_gamma   83.27
_symmetry_Int_Tables_number   1
_chemical_formula_structural   KTe2Pb
_chemical_formula_sum   'K1 Te2 Pb1'
_cell_volume   132.59
_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  0.0  0.0  1.0
  Te  Te2  1  0.75  0.0  0.19  1.0
  Te  Te3  1  0.0  0.75  0.19  1.0
  Pb  Pb1  1  0.0  0.0  0.38  1.0

data_KTe2Pb
_symmetry_space_group_name_H-M   Cm
_cell_length_a   7.78
_cell_length_b   7.78
_cell_length_c   5.86
_cell_angle_alpha   90.0
_cell_angle_beta   131.64
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   KTe2Pb
_chemical_formula_sum   'K2 Te4 Pb2'
_cell_volume   265.19
_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  0.0  0.0  0.0  1.0
  Te  Te1  4  0.12  0.12  0.44  1.0
  Pb  Pb2  2  0.0  0.0  0.38  1.0

K Te Te Pb
K Te Te Pb 0 1 - o o 0 2 o - o 0 3 o o o 1 3 + o o 2 3 o + o 
KPbTe2 crystallizes in the monoclinic Cm space group. K(1) is bonded in a 6-coordinate geometry to two equivalent Pb(1) and four equivalent Te(1) atoms. There is one shorter (2.21 Å) and one longer (3.65 Å) K(1)-Pb(1) bond length. There are two shorter (2.27 Å) and two longer (3.90 Å) K(1)-Te(1) bond lengths. Pb(1) is bonded in a distorted water-like geometry to two equivalent K(1) and two equivalent Te(1) atoms. Both Pb(1)-Te(1) bond lengths are 1.24 Å. Te(1) is bonded in a 1-coordinate geometry to two equivalent K(1) and one Pb(1) atom.