data_K2TeSe
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.0
_cell_length_b   7.0
_cell_length_c   5.54
_cell_angle_alpha   110.56
_cell_angle_beta   110.56
_cell_angle_gamma   32.7
_symmetry_Int_Tables_number   1
_chemical_formula_structural   K2TeSe
_chemical_formula_sum   'K2 Te1 Se1'
_cell_volume   136.35
_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  0.36  0.0  0.01  1.0
  K  K1  1  0.91  0.0  0.61  1.0
  Te  Te3  1  0.27  0.0  0.81  1.0
  Se  Se2  1  0.95  0.0  0.46  1.0

data_K2TeSe
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.94
_cell_length_b   5.54
_cell_length_c   7.0
_cell_angle_alpha   110.56
_cell_angle_beta   106.35
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   K2TeSe
_chemical_formula_sum   'K2 Te1 Se1'
_cell_volume   136.35
_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  0.01  0.36  1.0
  K  K1  1  0.0  0.61  0.91  1.0
  Te  Te2  1  0.0  0.81  0.27  1.0
  Se  Se3  1  0.0  0.46  0.95  1.0

K K Te Se
K K Te Se 0 2 o o - 1 3 o o o 
KTeKSe crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of one potassium hydroselenide molecule and one KTe cluster. In the KTe cluster, K(1) is bonded in a single-bond geometry to one Te(1) atom. The K(1)-Te(1) bond length is 1.11 Å. Te(1) is bonded in a distorted single-bond geometry to one K(1) atom.