The crystal structure described by K2Te2O5 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(3), one O(4), and three equivalent O(5) atoms. In the second K site, K(2) is bonded in a 7-coordinate geometry to one O(3), one O(5), two equivalent O(4), and three equivalent O(1) atoms. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded in a distorted rectangular see-saw-like geometry to one O(2), one O(5), and two equivalent O(4) atoms. In the second Te site, Te(2) is bonded in a distorted trigonal non-coplanar geometry to one O(1), one O(2), and one O(3) atom. There are five inequivalent O sites. In the first O site, O(5) is bonded in a 5-coordinate geometry to one K(2), three equivalent K(1), and one Te(1) atom. In the second O site, O(1) is bonded in a 5-coordinate geometry to one K(1), three equivalent K(2), and one Te(2) atom. In the third O site, O(2) is bonded in a 3-coordinate geometry to one K(1), one Te(1), and one Te(2) atom. In the fourth O site, O(3) is bonded in a 3-coordinate geometry to one K(1), one K(2), and one Te(2) atom. In the fifth O site, O(4) is bonded in a 2-coordinate geometry to one K(1), two equivalent K(2), and two equivalent Te(1) atoms. is represented by the CIF file [CIF]
data_K2Te2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   15.220
_cell_length_b   5.471
_cell_length_c   7.730
_cell_angle_alpha   85.934
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   642.087
_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
  K  K0  1  0.433  0.266  0.626  1.0
  K  K1  1  0.933  0.234  0.374  1.0
  K  K2  1  0.567  0.734  0.374  1.0
  K  K3  1  0.067  0.766  0.626  1.0
  K  K4  1  0.318  0.736  0.879  1.0
  K  K5  1  0.818  0.764  0.121  1.0
  K  K6  1  0.682  0.264  0.121  1.0
  K  K7  1  0.182  0.236  0.879  1.0
  Te  Te8  1  0.317  0.801  0.414  1.0
  Te  Te9  1  0.817  0.699  0.586  1.0
  Te  Te10  1  0.683  0.199  0.586  1.0
  Te  Te11  1  0.183  0.301  0.414  1.0
  Te  Te12  1  0.438  0.248  0.119  1.0
  Te  Te13  1  0.938  0.252  0.881  1.0
  Te  Te14  1  0.562  0.752  0.881  1.0
  Te  Te15  1  0.062  0.748  0.119  1.0
  O  O16  1  0.354  0.227  0.946  1.0
  O  O17  1  0.854  0.273  0.054  1.0
  O  O18  1  0.646  0.773  0.054  1.0
  O  O19  1  0.146  0.727  0.946  1.0
  O  O20  1  0.364  0.160  0.315  1.0
  O  O21  1  0.864  0.340  0.685  1.0
  O  O22  1  0.636  0.840  0.685  1.0
  O  O23  1  0.136  0.660  0.315  1.0
  O  O24  1  0.439  0.583  0.144  1.0
  O  O25  1  0.939  0.917  0.856  1.0
  O  O26  1  0.561  0.417  0.856  1.0
  O  O27  1  0.061  0.083  0.144  1.0
  O  O28  1  0.256  0.499  0.553  1.0
  O  O29  1  0.756  0.001  0.447  1.0
  O  O30  1  0.744  0.501  0.447  1.0
  O  O31  1  0.244  0.999  0.553  1.0
  O  O32  1  0.090  0.266  0.565  1.0
  O  O33  1  0.590  0.234  0.435  1.0
  O  O34  1  0.910  0.734  0.435  1.0
  O  O35  1  0.410  0.766  0.565  1.0
[/CIF]
.
The crystal structure described by K2Te2O5 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(3), one O(4), and three equivalent O(5) atoms. In the second K site, K(2) is bonded in a 7-coordinate geometry to one O(3), one O(5), two equivalent O(4), and three equivalent O(1) atoms. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded in a distorted rectangular see-saw-like geometry to one O(2), one O(5), and two equivalent O(4) atoms. In the second Te site, Te(2) is bonded in a distorted trigonal non-coplanar geometry to one O(1), one O(2), and one O(3) atom. There are five inequivalent O sites. In the first O site, O(5) is bonded in a 5-coordinate geometry to one K(2), three equivalent K(1), and one Te(1) atom. In the second O site, O(1) is bonded in a 5-coordinate geometry to one K(1), three equivalent K(2), and one Te(2) atom. In the third O site, O(2) is bonded in a 3-coordinate geometry to one K(1), one Te(1), and one Te(2) atom. In the fourth O site, O(3) is bonded in a 3-coordinate geometry to one K(1), one K(2), and one Te(2) atom. In the fifth O site, O(4) is bonded in a 2-coordinate geometry to one K(1), two equivalent K(2), and two equivalent Te(1) atoms. is represented by the CIF file [CIF]
data_K2Te2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   15.220
_cell_length_b   5.471
_cell_length_c   7.730
_cell_angle_alpha   85.934
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   642.087
_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
  K  K0  1  0.433  0.266  0.626  1.0
  K  K1  1  0.933  0.234  0.374  1.0
  K  K2  1  0.567  0.734  0.374  1.0
  K  K3  1  0.067  0.766  0.626  1.0
  K  K4  1  0.318  0.736  0.879  1.0
  K  K5  1  0.818  0.764  0.121  1.0
  K  K6  1  0.682  0.264  0.121  1.0
  K  K7  1  0.182  0.236  0.879  1.0
  Te  Te8  1  0.317  0.801  0.414  1.0
  Te  Te9  1  0.817  0.699  0.586  1.0
  Te  Te10  1  0.683  0.199  0.586  1.0
  Te  Te11  1  0.183  0.301  0.414  1.0
  Te  Te12  1  0.438  0.248  0.119  1.0
  Te  Te13  1  0.938  0.252  0.881  1.0
  Te  Te14  1  0.562  0.752  0.881  1.0
  Te  Te15  1  0.062  0.748  0.119  1.0
  O  O16  1  0.354  0.227  0.946  1.0
  O  O17  1  0.854  0.273  0.054  1.0
  O  O18  1  0.646  0.773  0.054  1.0
  O  O19  1  0.146  0.727  0.946  1.0
  O  O20  1  0.364  0.160  0.315  1.0
  O  O21  1  0.864  0.340  0.685  1.0
  O  O22  1  0.636  0.840  0.685  1.0
  O  O23  1  0.136  0.660  0.315  1.0
  O  O24  1  0.439  0.583  0.144  1.0
  O  O25  1  0.939  0.917  0.856  1.0
  O  O26  1  0.561  0.417  0.856  1.0
  O  O27  1  0.061  0.083  0.144  1.0
  O  O28  1  0.256  0.499  0.553  1.0
  O  O29  1  0.756  0.001  0.447  1.0
  O  O30  1  0.744  0.501  0.447  1.0
  O  O31  1  0.244  0.999  0.553  1.0
  O  O32  1  0.090  0.266  0.565  1.0
  O  O33  1  0.590  0.234  0.435  1.0
  O  O34  1  0.910  0.734  0.435  1.0
  O  O35  1  0.410  0.766  0.565  1.0
[/CIF]
.