The compound described by K7Na(TeO8)4 crystallizes in the orthorhombic Immm space group. There are four inequivalent K sites. In the first K site, K(1) is bonded in a 8-coordinate geometry to four equivalent O(5) and four equivalent O(7) atoms. In the second K site, K(2) is bonded in a 8-coordinate geometry to four equivalent O(5) and four equivalent O(6) atoms. In the third K site, K(3) is bonded in a 8-coordinate geometry to two equivalent O(3), two equivalent O(6), and four equivalent O(7) atoms. In the fourth K site, K(4) is bonded in a 8-coordinate geometry to eight equivalent O(7) atoms. Na(1) is bonded to two equivalent O(2) and four equivalent O(6) atoms to form NaO6 octahedra that share corners with four equivalent Te(1)O5 trigonal bipyramids. Te(1) is bonded to one O(1), one O(2), one O(3), and two equivalent O(5) atoms to form distorted TeO5 trigonal bipyramids that share  a cornercorner with one Na(1)O6 octahedra and  an edgeedge with one Te(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 49°. There are seven inequivalent O sites. In the first O site, O(4) is bonded in a bent 120 degrees geometry to two equivalent O(7) atoms. In the second O site, O(5) is bonded in a 3-coordinate geometry to one K(1), one K(2), and one Te(1) atom. In the third O site, O(6) is bonded in a 4-coordinate geometry to one K(3), two equivalent K(2), one Na(1), and one O(6) atom. In the fourth O site, O(7) is bonded in a distorted rectangular see-saw-like geometry to one K(1), one K(3), one K(4), and one O(4) atom. In the fifth O site, O(1) is bonded in a water-like geometry to two equivalent Te(1) atoms. In the sixth O site, O(2) is bonded in a distorted trigonal planar geometry to one Na(1) and two equivalent Te(1) atoms. In the seventh O site, O(3) is bonded in a single-bond geometry to one K(3) and one Te(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_K7Na(TeO8)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.836
_cell_length_b   11.836
_cell_length_c   11.836
_cell_angle_alpha   145.676
_cell_angle_beta   104.894
_cell_angle_gamma   85.245
_symmetry_Int_Tables_number   1
_cell_volume   877.688
_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  0.696  0.196  0.500  1.0
  K  K1  1  0.304  0.804  0.500  1.0
  K  K2  1  0.866  0.366  0.500  1.0
  K  K3  1  0.134  0.634  0.500  1.0
  K  K4  1  0.734  0.500  0.234  1.0
  K  K5  1  0.266  0.500  0.766  1.0
  K  K6  1  0.500  0.000  0.500  1.0
  Na  Na7  1  0.000  0.000  0.000  1.0
  Te  Te8  1  0.660  0.770  0.890  1.0
  Te  Te9  1  0.120  0.230  0.890  1.0
  Te  Te10  1  0.880  0.770  0.110  1.0
  Te  Te11  1  0.340  0.230  0.110  1.0
  O  O12  1  0.701  0.701  0.000  1.0
  O  O13  1  0.299  0.299  0.000  1.0
  O  O14  1  0.850  0.850  0.000  1.0
  O  O15  1  0.150  0.150  0.000  1.0
  O  O16  1  0.495  0.691  0.804  1.0
  O  O17  1  0.112  0.309  0.804  1.0
  O  O18  1  0.888  0.691  0.196  1.0
  O  O19  1  0.505  0.309  0.196  1.0
  O  O20  1  0.618  0.919  0.698  1.0
  O  O21  1  0.779  0.081  0.698  1.0
  O  O22  1  0.221  0.919  0.302  1.0
  O  O23  1  0.382  0.081  0.302  1.0
  O  O24  1  0.683  0.559  0.628  1.0
  O  O25  1  0.070  0.441  0.125  1.0
  O  O26  1  0.930  0.055  0.372  1.0
  O  O27  1  0.317  0.945  0.875  1.0
  O  O28  1  0.317  0.441  0.372  1.0
  O  O29  1  0.930  0.559  0.875  1.0
  O  O30  1  0.070  0.945  0.628  1.0
  O  O31  1  0.683  0.055  0.125  1.0
  O  O32  1  0.955  0.684  0.639  1.0
  O  O33  1  0.955  0.316  0.271  1.0
  O  O34  1  0.045  0.316  0.361  1.0
  O  O35  1  0.045  0.684  0.729  1.0
  O  O36  1  0.565  0.755  0.488  1.0
  O  O37  1  0.732  0.245  0.810  1.0
  O  O38  1  0.268  0.077  0.512  1.0
  O  O39  1  0.435  0.923  0.190  1.0
  O  O40  1  0.435  0.245  0.512  1.0
  O  O41  1  0.268  0.755  0.190  1.0
  O  O42  1  0.732  0.923  0.488  1.0
  O  O43  1  0.565  0.077  0.810  1.0
[/CIF]
.
The compound described by K7Na(TeO8)4 crystallizes in the orthorhombic Immm space group. There are four inequivalent K sites. In the first K site, K(1) is bonded in a 8-coordinate geometry to four equivalent O(5) and four equivalent O(7) atoms. In the second K site, K(2) is bonded in a 8-coordinate geometry to four equivalent O(5) and four equivalent O(6) atoms. In the third K site, K(3) is bonded in a 8-coordinate geometry to two equivalent O(3), two equivalent O(6), and four equivalent O(7) atoms. In the fourth K site, K(4) is bonded in a 8-coordinate geometry to eight equivalent O(7) atoms. Na(1) is bonded to two equivalent O(2) and four equivalent O(6) atoms to form NaO6 octahedra that share corners with four equivalent Te(1)O5 trigonal bipyramids. Te(1) is bonded to one O(1), one O(2), one O(3), and two equivalent O(5) atoms to form distorted TeO5 trigonal bipyramids that share  a cornercorner with one Na(1)O6 octahedra and  an edgeedge with one Te(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 49°. There are seven inequivalent O sites. In the first O site, O(4) is bonded in a bent 120 degrees geometry to two equivalent O(7) atoms. In the second O site, O(5) is bonded in a 3-coordinate geometry to one K(1), one K(2), and one Te(1) atom. In the third O site, O(6) is bonded in a 4-coordinate geometry to one K(3), two equivalent K(2), one Na(1), and one O(6) atom. In the fourth O site, O(7) is bonded in a distorted rectangular see-saw-like geometry to one K(1), one K(3), one K(4), and one O(4) atom. In the fifth O site, O(1) is bonded in a water-like geometry to two equivalent Te(1) atoms. In the sixth O site, O(2) is bonded in a distorted trigonal planar geometry to one Na(1) and two equivalent Te(1) atoms. In the seventh O site, O(3) is bonded in a single-bond geometry to one K(3) and one Te(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_K7Na(TeO8)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.836
_cell_length_b   11.836
_cell_length_c   11.836
_cell_angle_alpha   145.676
_cell_angle_beta   104.894
_cell_angle_gamma   85.245
_symmetry_Int_Tables_number   1
_cell_volume   877.688
_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  0.696  0.196  0.500  1.0
  K  K1  1  0.304  0.804  0.500  1.0
  K  K2  1  0.866  0.366  0.500  1.0
  K  K3  1  0.134  0.634  0.500  1.0
  K  K4  1  0.734  0.500  0.234  1.0
  K  K5  1  0.266  0.500  0.766  1.0
  K  K6  1  0.500  0.000  0.500  1.0
  Na  Na7  1  0.000  0.000  0.000  1.0
  Te  Te8  1  0.660  0.770  0.890  1.0
  Te  Te9  1  0.120  0.230  0.890  1.0
  Te  Te10  1  0.880  0.770  0.110  1.0
  Te  Te11  1  0.340  0.230  0.110  1.0
  O  O12  1  0.701  0.701  0.000  1.0
  O  O13  1  0.299  0.299  0.000  1.0
  O  O14  1  0.850  0.850  0.000  1.0
  O  O15  1  0.150  0.150  0.000  1.0
  O  O16  1  0.495  0.691  0.804  1.0
  O  O17  1  0.112  0.309  0.804  1.0
  O  O18  1  0.888  0.691  0.196  1.0
  O  O19  1  0.505  0.309  0.196  1.0
  O  O20  1  0.618  0.919  0.698  1.0
  O  O21  1  0.779  0.081  0.698  1.0
  O  O22  1  0.221  0.919  0.302  1.0
  O  O23  1  0.382  0.081  0.302  1.0
  O  O24  1  0.683  0.559  0.628  1.0
  O  O25  1  0.070  0.441  0.125  1.0
  O  O26  1  0.930  0.055  0.372  1.0
  O  O27  1  0.317  0.945  0.875  1.0
  O  O28  1  0.317  0.441  0.372  1.0
  O  O29  1  0.930  0.559  0.875  1.0
  O  O30  1  0.070  0.945  0.628  1.0
  O  O31  1  0.683  0.055  0.125  1.0
  O  O32  1  0.955  0.684  0.639  1.0
  O  O33  1  0.955  0.316  0.271  1.0
  O  O34  1  0.045  0.316  0.361  1.0
  O  O35  1  0.045  0.684  0.729  1.0
  O  O36  1  0.565  0.755  0.488  1.0
  O  O37  1  0.732  0.245  0.810  1.0
  O  O38  1  0.268  0.077  0.512  1.0
  O  O39  1  0.435  0.923  0.190  1.0
  O  O40  1  0.435  0.245  0.512  1.0
  O  O41  1  0.268  0.755  0.190  1.0
  O  O42  1  0.732  0.923  0.488  1.0
  O  O43  1  0.565  0.077  0.810  1.0
[/CIF]
.