The material structure described by Cs2K2TeO5 crystallizes in the tetragonal P4_2/mnm space group. There are two inequivalent Cs sites. In the first Cs site, Cs(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form distorted CsO6 octahedra that share corners with six equivalent Te(1)O5 trigonal bipyramids and  an edgeedge with one Cs(1)O6 octahedra. In the second Cs site, Cs(2) is bonded in a 8-coordinate geometry to four equivalent O(1) and four equivalent O(2) atoms. K(1) is bonded in a 6-coordinate geometry to one O(3), two equivalent O(1), and three equivalent O(2) atoms. Te(1) is bonded to one O(3), two equivalent O(1), and two equivalent O(2) atoms to form TeO5 trigonal bipyramids that share corners with six equivalent Cs(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 1-45°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one Cs(1), two equivalent Cs(2), two equivalent K(1), and one Te(1) atom. In the second O site, O(2) is bonded in a 7-coordinate geometry to one Cs(1), two equivalent Cs(2), three equivalent K(1), and one Te(1) atom. In the third O site, O(3) is bonded in a 5-coordinate geometry to two equivalent Cs(1), two equivalent K(1), and one Te(1) atom. is represented by the CIF card [CIF]
data_Cs2K2TeO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.362
_cell_length_b   9.362
_cell_length_c   9.712
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   851.151
_cell_formula_units_Z   4
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
  Cs  Cs0  1  0.665  0.665  0.500  1.0
  Cs  Cs1  1  0.335  0.335  0.500  1.0
  Cs  Cs2  1  0.835  0.165  0.000  1.0
  Cs  Cs3  1  0.500  0.000  0.750  1.0
  Cs  Cs4  1  0.165  0.835  0.000  1.0
  Cs  Cs5  1  0.000  0.500  0.250  1.0
  Cs  Cs6  1  0.000  0.500  0.750  1.0
  Cs  Cs7  1  0.500  0.000  0.250  1.0
  K  K8  1  0.124  0.124  0.715  1.0
  K  K9  1  0.876  0.876  0.285  1.0
  K  K10  1  0.624  0.376  0.785  1.0
  K  K11  1  0.376  0.624  0.215  1.0
  K  K12  1  0.376  0.624  0.785  1.0
  K  K13  1  0.624  0.376  0.215  1.0
  K  K14  1  0.124  0.124  0.285  1.0
  K  K15  1  0.876  0.876  0.715  1.0
  Te  Te16  1  0.192  0.808  0.500  1.0
  Te  Te17  1  0.692  0.692  0.000  1.0
  Te  Te18  1  0.308  0.308  0.000  1.0
  Te  Te19  1  0.808  0.192  0.500  1.0
  O  O20  1  0.502  0.769  0.000  1.0
  O  O21  1  0.231  0.498  0.000  1.0
  O  O22  1  0.731  0.002  0.500  1.0
  O  O23  1  0.180  0.820  0.701  1.0
  O  O24  1  0.320  0.320  0.201  1.0
  O  O25  1  0.498  0.231  0.000  1.0
  O  O26  1  0.320  0.320  0.799  1.0
  O  O27  1  0.164  0.164  0.000  1.0
  O  O28  1  0.269  0.998  0.500  1.0
  O  O29  1  0.820  0.180  0.701  1.0
  O  O30  1  0.769  0.502  0.000  1.0
  O  O31  1  0.680  0.680  0.799  1.0
  O  O32  1  0.664  0.336  0.500  1.0
  O  O33  1  0.002  0.731  0.500  1.0
  O  O34  1  0.336  0.664  0.500  1.0
  O  O35  1  0.180  0.820  0.299  1.0
  O  O36  1  0.680  0.680  0.201  1.0
  O  O37  1  0.998  0.269  0.500  1.0
  O  O38  1  0.820  0.180  0.299  1.0
  O  O39  1  0.836  0.836  0.000  1.0
[/CIF]
.
The material structure described by Cs2K2TeO5 crystallizes in the tetragonal P4_2/mnm space group. There are two inequivalent Cs sites. In the first Cs site, Cs(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form distorted CsO6 octahedra that share corners with six equivalent Te(1)O5 trigonal bipyramids and  an edgeedge with one Cs(1)O6 octahedra. In the second Cs site, Cs(2) is bonded in a 8-coordinate geometry to four equivalent O(1) and four equivalent O(2) atoms. K(1) is bonded in a 6-coordinate geometry to one O(3), two equivalent O(1), and three equivalent O(2) atoms. Te(1) is bonded to one O(3), two equivalent O(1), and two equivalent O(2) atoms to form TeO5 trigonal bipyramids that share corners with six equivalent Cs(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 1-45°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one Cs(1), two equivalent Cs(2), two equivalent K(1), and one Te(1) atom. In the second O site, O(2) is bonded in a 7-coordinate geometry to one Cs(1), two equivalent Cs(2), three equivalent K(1), and one Te(1) atom. In the third O site, O(3) is bonded in a 5-coordinate geometry to two equivalent Cs(1), two equivalent K(1), and one Te(1) atom. is represented by the CIF card [CIF]
data_Cs2K2TeO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.362
_cell_length_b   9.362
_cell_length_c   9.712
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   851.151
_cell_formula_units_Z   4
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
  Cs  Cs0  1  0.665  0.665  0.500  1.0
  Cs  Cs1  1  0.335  0.335  0.500  1.0
  Cs  Cs2  1  0.835  0.165  0.000  1.0
  Cs  Cs3  1  0.500  0.000  0.750  1.0
  Cs  Cs4  1  0.165  0.835  0.000  1.0
  Cs  Cs5  1  0.000  0.500  0.250  1.0
  Cs  Cs6  1  0.000  0.500  0.750  1.0
  Cs  Cs7  1  0.500  0.000  0.250  1.0
  K  K8  1  0.124  0.124  0.715  1.0
  K  K9  1  0.876  0.876  0.285  1.0
  K  K10  1  0.624  0.376  0.785  1.0
  K  K11  1  0.376  0.624  0.215  1.0
  K  K12  1  0.376  0.624  0.785  1.0
  K  K13  1  0.624  0.376  0.215  1.0
  K  K14  1  0.124  0.124  0.285  1.0
  K  K15  1  0.876  0.876  0.715  1.0
  Te  Te16  1  0.192  0.808  0.500  1.0
  Te  Te17  1  0.692  0.692  0.000  1.0
  Te  Te18  1  0.308  0.308  0.000  1.0
  Te  Te19  1  0.808  0.192  0.500  1.0
  O  O20  1  0.502  0.769  0.000  1.0
  O  O21  1  0.231  0.498  0.000  1.0
  O  O22  1  0.731  0.002  0.500  1.0
  O  O23  1  0.180  0.820  0.701  1.0
  O  O24  1  0.320  0.320  0.201  1.0
  O  O25  1  0.498  0.231  0.000  1.0
  O  O26  1  0.320  0.320  0.799  1.0
  O  O27  1  0.164  0.164  0.000  1.0
  O  O28  1  0.269  0.998  0.500  1.0
  O  O29  1  0.820  0.180  0.701  1.0
  O  O30  1  0.769  0.502  0.000  1.0
  O  O31  1  0.680  0.680  0.799  1.0
  O  O32  1  0.664  0.336  0.500  1.0
  O  O33  1  0.002  0.731  0.500  1.0
  O  O34  1  0.336  0.664  0.500  1.0
  O  O35  1  0.180  0.820  0.299  1.0
  O  O36  1  0.680  0.680  0.201  1.0
  O  O37  1  0.998  0.269  0.500  1.0
  O  O38  1  0.820  0.180  0.299  1.0
  O  O39  1  0.836  0.836  0.000  1.0
[/CIF]
.