data_K8SrTe6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.18
_cell_length_b   10.18
_cell_length_c   10.18
_cell_angle_alpha   95.44
_cell_angle_beta   95.44
_cell_angle_gamma   144.13
_symmetry_Int_Tables_number   1
_chemical_formula_structural   K8SrTe6
_chemical_formula_sum   'K8 Sr1 Te6'
_cell_volume   588.56
_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  0.65  0.02  0.52  1.0
  K  K1  1  0.05  0.98  0.52  1.0
  K  K2  1  0.2  0.87  0.61  1.0
  K  K3  1  0.8  0.83  0.61  1.0
  K  K4  1  0.83  0.8  0.61  1.0
  K  K5  1  0.87  0.2  0.61  1.0
  K  K6  1  0.98  0.05  0.52  1.0
  K  K7  1  0.02  0.65  0.52  1.0
  Sr  Sr8  1  0.0  0.0  0.0  1.0
  Te  Te9  1  0.85  0.0  0.0  1.0
  Te  Te10  1  0.0  0.85  0.0  1.0
  Te  Te11  1  0.06  0.06  0.47  1.0
  Te  Te12  1  0.79  0.79  0.33  1.0
  Te  Te13  1  0.94  0.06  0.8  1.0
  Te  Te14  1  0.06  0.94  0.8  1.0

data_K8SrTe6
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.27
_cell_length_b   19.37
_cell_length_c   10.18
_cell_angle_alpha   90.0
_cell_angle_beta   107.94
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   K8SrTe6
_chemical_formula_sum   'K16 Sr2 Te12'
_cell_volume   1177.12
_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  4  0.17  0.19  0.48  1.0
  K  K1  4  0.19  0.02  0.39  1.0
  K  K2  4  0.46  0.33  0.39  1.0
  K  K3  4  0.48  0.54  0.48  1.0
  Sr  Sr4  2  0.0  0.0  0.0  1.0
  Te  Te5  4  0.0  0.06  0.2  1.0
  Te  Te6  4  0.08  0.92  0.0  1.0
  Te  Te7  2  0.21  0.0  0.67  1.0
  Te  Te8  2  0.44  0.5  0.53  1.0

K K K K K K K K Sr Te Te Te Te Te Te
(K2Te)4SrTe2 is alpha carbon monoxide-like structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two K2Te clusters and two SrTe2 clusters. In each K2Te cluster, there are four inequivalent K sites. In the first K site, K(1) is bonded in a single-bond geometry to one K(3) atom. The K(1)-K(3) bond length is 1.38 Å. In the second K site, K(2) is bonded in a single-bond geometry to one K(4), one Te(2), and one Te(3) atom. The K(2)-K(4) bond length is 1.84 Å. The K(2)-Te(2) bond length is 0.99 Å. The K(2)-Te(3) bond length is 2.14 Å. In the third K site, K(3) is bonded in a distorted bent 120 degrees geometry to one K(1) and one Te(4) atom. The K(3)-Te(4) bond length is 2.85 Å. In the fourth K site, K(4) is bonded in a 3-coordinate geometry to one K(2), one K(4), and one Te(4) atom. The K(4)-K(4) bond length is 0.62 Å. The K(4)-Te(4) bond length is 2.13 Å. There are three inequivalent Te sites. In the first Te site, Te(2) is bonded in an L-shaped geometry to two equivalent K(2) and one Te(3) atom. The Te(2)-Te(3) bond length is 1.85 Å. In the second Te site, Te(3) is bonded in a 3-coordinate geometry to two equivalent K(2) and one Te(2) atom. In the third Te site, Te(4) is bonded in a 1-coordinate geometry to one K(3) and one K(4) atom. In each SrTe2 cluster, Sr(1) is bonded in a distorted bent 150 degrees geometry to two equivalent Te(1) atoms. Both Sr(1)-Te(1) bond lengths are 1.53 Å. Te(1) is bonded in a single-bond geometry to one Sr(1) atom.