The material structure described by K6Na2PtTe2O26 crystallizes in the monoclinic C2/m space group. There are three inequivalent K sites. In the first K site, K(1) is bonded in a 9-coordinate geometry to one O(8), two equivalent O(2), two equivalent O(9), and four equivalent O(6) atoms. In the second K site, K(2) is bonded in a 11-coordinate geometry to one O(1), one O(3), one O(4), two equivalent O(5), two equivalent O(6), and four equivalent O(7) atoms. In the third K site, K(3) is bonded in a distorted hexagonal planar geometry to one O(4), one O(8), two equivalent O(5), and two equivalent O(7) atoms. Na(1) is bonded in a 6-coordinate geometry to one O(8), one O(9), two equivalent O(6), and two equivalent O(7) atoms. Pt(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form PtO6 octahedra that share edges with two equivalent Te(1)O6 octahedra. Te(1) is bonded to one O(3), one O(4), two equivalent O(2), and two equivalent O(5) atoms to form TeO6 octahedra that share  an edgeedge with one Pt(1)O6 octahedra. There are nine inequivalent O sites. In the first O site, O(5) is bonded in a distorted bent 120 degrees geometry to one K(2), one K(3), and one Te(1) atom. In the second O site, O(6) is bonded in a 4-coordinate geometry to one K(2), two equivalent K(1), and one Na(1) atom. In the third O site, O(7) is bonded in a 5-coordinate geometry to one K(3), two equivalent K(2), one Na(1), and one O(7) atom. In the fourth O site, O(8) is bonded in a distorted single-bond geometry to one K(1), one K(3), and one Na(1) atom. In the fifth O site, O(9) is bonded in a 1-coordinate geometry to two equivalent K(1) and one Na(1) atom. In the sixth O site, O(1) is bonded in a distorted bent 150 degrees geometry to one K(2) and one Pt(1) atom. In the seventh O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one K(1), one Pt(1), and one Te(1) atom. In the eighth O site, O(3) is bonded in a single-bond geometry to one K(2) and one Te(1) atom. In the ninth O site, O(4) is bonded in a 3-coordinate geometry to one K(2), one K(3), and one Te(1) atom. is represented by the CIF file [CIF]
data_K6Na2Te2PtO26
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.932
_cell_length_b   8.031
_cell_length_c   11.607
_cell_angle_alpha   98.440
_cell_angle_beta   107.374
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   609.335
_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  0.458  0.302  0.917  1.0
  K  K1  1  0.542  0.698  0.083  1.0
  K  K2  1  0.833  0.596  0.666  1.0
  K  K3  1  0.167  0.404  0.334  1.0
  K  K4  1  0.293  0.080  0.586  1.0
  K  K5  1  0.707  0.920  0.414  1.0
  Na  Na6  1  0.390  0.715  0.780  1.0
  Na  Na7  1  0.610  0.285  0.220  1.0
  Te  Te8  1  0.882  0.174  0.764  1.0
  Te  Te9  1  0.118  0.826  0.236  1.0
  Pt  Pt10  1  0.000  0.000  0.000  1.0
  O  O11  1  0.949  0.797  0.898  1.0
  O  O12  1  0.051  0.203  0.102  1.0
  O  O13  1  0.126  0.092  0.884  1.0
  O  O14  1  0.759  0.092  0.884  1.0
  O  O15  1  0.874  0.908  0.116  1.0
  O  O16  1  0.241  0.908  0.116  1.0
  O  O17  1  0.937  0.396  0.874  1.0
  O  O18  1  0.063  0.604  0.126  1.0
  O  O19  1  0.828  0.966  0.655  1.0
  O  O20  1  0.172  0.034  0.345  1.0
  O  O21  1  0.044  0.256  0.673  1.0
  O  O22  1  0.629  0.256  0.673  1.0
  O  O23  1  0.956  0.744  0.327  1.0
  O  O24  1  0.371  0.744  0.327  1.0
  O  O25  1  0.183  0.543  0.839  1.0
  O  O26  1  0.656  0.543  0.839  1.0
  O  O27  1  0.817  0.457  0.161  1.0
  O  O28  1  0.344  0.457  0.161  1.0
  O  O29  1  0.184  0.718  0.551  1.0
  O  O30  1  0.367  0.718  0.551  1.0
  O  O31  1  0.816  0.282  0.449  1.0
  O  O32  1  0.633  0.282  0.449  1.0
  O  O33  1  0.340  0.440  0.680  1.0
  O  O34  1  0.660  0.560  0.320  1.0
  O  O35  1  0.455  0.962  0.909  1.0
  O  O36  1  0.545  0.038  0.091  1.0
[/CIF]
.
The material structure described by K6Na2PtTe2O26 crystallizes in the monoclinic C2/m space group. There are three inequivalent K sites. In the first K site, K(1) is bonded in a 9-coordinate geometry to one O(8), two equivalent O(2), two equivalent O(9), and four equivalent O(6) atoms. In the second K site, K(2) is bonded in a 11-coordinate geometry to one O(1), one O(3), one O(4), two equivalent O(5), two equivalent O(6), and four equivalent O(7) atoms. In the third K site, K(3) is bonded in a distorted hexagonal planar geometry to one O(4), one O(8), two equivalent O(5), and two equivalent O(7) atoms. Na(1) is bonded in a 6-coordinate geometry to one O(8), one O(9), two equivalent O(6), and two equivalent O(7) atoms. Pt(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form PtO6 octahedra that share edges with two equivalent Te(1)O6 octahedra. Te(1) is bonded to one O(3), one O(4), two equivalent O(2), and two equivalent O(5) atoms to form TeO6 octahedra that share  an edgeedge with one Pt(1)O6 octahedra. There are nine inequivalent O sites. In the first O site, O(5) is bonded in a distorted bent 120 degrees geometry to one K(2), one K(3), and one Te(1) atom. In the second O site, O(6) is bonded in a 4-coordinate geometry to one K(2), two equivalent K(1), and one Na(1) atom. In the third O site, O(7) is bonded in a 5-coordinate geometry to one K(3), two equivalent K(2), one Na(1), and one O(7) atom. In the fourth O site, O(8) is bonded in a distorted single-bond geometry to one K(1), one K(3), and one Na(1) atom. In the fifth O site, O(9) is bonded in a 1-coordinate geometry to two equivalent K(1) and one Na(1) atom. In the sixth O site, O(1) is bonded in a distorted bent 150 degrees geometry to one K(2) and one Pt(1) atom. In the seventh O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one K(1), one Pt(1), and one Te(1) atom. In the eighth O site, O(3) is bonded in a single-bond geometry to one K(2) and one Te(1) atom. In the ninth O site, O(4) is bonded in a 3-coordinate geometry to one K(2), one K(3), and one Te(1) atom. is represented by the CIF file [CIF]
data_K6Na2Te2PtO26
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.932
_cell_length_b   8.031
_cell_length_c   11.607
_cell_angle_alpha   98.440
_cell_angle_beta   107.374
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   609.335
_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  0.458  0.302  0.917  1.0
  K  K1  1  0.542  0.698  0.083  1.0
  K  K2  1  0.833  0.596  0.666  1.0
  K  K3  1  0.167  0.404  0.334  1.0
  K  K4  1  0.293  0.080  0.586  1.0
  K  K5  1  0.707  0.920  0.414  1.0
  Na  Na6  1  0.390  0.715  0.780  1.0
  Na  Na7  1  0.610  0.285  0.220  1.0
  Te  Te8  1  0.882  0.174  0.764  1.0
  Te  Te9  1  0.118  0.826  0.236  1.0
  Pt  Pt10  1  0.000  0.000  0.000  1.0
  O  O11  1  0.949  0.797  0.898  1.0
  O  O12  1  0.051  0.203  0.102  1.0
  O  O13  1  0.126  0.092  0.884  1.0
  O  O14  1  0.759  0.092  0.884  1.0
  O  O15  1  0.874  0.908  0.116  1.0
  O  O16  1  0.241  0.908  0.116  1.0
  O  O17  1  0.937  0.396  0.874  1.0
  O  O18  1  0.063  0.604  0.126  1.0
  O  O19  1  0.828  0.966  0.655  1.0
  O  O20  1  0.172  0.034  0.345  1.0
  O  O21  1  0.044  0.256  0.673  1.0
  O  O22  1  0.629  0.256  0.673  1.0
  O  O23  1  0.956  0.744  0.327  1.0
  O  O24  1  0.371  0.744  0.327  1.0
  O  O25  1  0.183  0.543  0.839  1.0
  O  O26  1  0.656  0.543  0.839  1.0
  O  O27  1  0.817  0.457  0.161  1.0
  O  O28  1  0.344  0.457  0.161  1.0
  O  O29  1  0.184  0.718  0.551  1.0
  O  O30  1  0.367  0.718  0.551  1.0
  O  O31  1  0.816  0.282  0.449  1.0
  O  O32  1  0.633  0.282  0.449  1.0
  O  O33  1  0.340  0.440  0.680  1.0
  O  O34  1  0.660  0.560  0.320  1.0
  O  O35  1  0.455  0.962  0.909  1.0
  O  O36  1  0.545  0.038  0.091  1.0
[/CIF]
.