The structure described by K5Na3Ta7NbO24 is (Cubic) Perovskite-derived structured and crystallizes in the monoclinic Cm space group. There are four inequivalent K sites. In the first K site, K(1) is bonded to one O(13), one O(9), two equivalent O(1), two equivalent O(11), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form KO12 cuboctahedra that share corners with four equivalent K(3)O12 cuboctahedra, corners with eight equivalent Na(2)O12 cuboctahedra, faces with two equivalent Na(1)O12 cuboctahedra, faces with four equivalent K(2)O12 cuboctahedra,  a faceface with one Ta(1)O6 octahedra,  a faceface with one Ta(2)O6 octahedra,  a faceface with one Ta(5)O6 octahedra,  a faceface with one Nb(1)O6 octahedra, faces with two equivalent Ta(3)O6 octahedra, and faces with two equivalent Ta(4)O6 octahedra. In the second K site, K(2) is bonded to one O(1), one O(13), one O(2), one O(3), one O(4), one O(5), one O(6), one O(7), one O(8), one O(9), and two equivalent O(11) atoms to form KO12 cuboctahedra that share corners with four equivalent K(2)O12 cuboctahedra, corners with four equivalent K(4)O12 cuboctahedra, corners with four equivalent Na(1)O12 cuboctahedra, faces with two equivalent K(1)O12 cuboctahedra, faces with two equivalent K(3)O12 cuboctahedra, faces with two equivalent Na(2)O12 cuboctahedra,  a faceface with one Ta(1)O6 octahedra,  a faceface with one Ta(2)O6 octahedra,  a faceface with one Ta(5)O6 octahedra,  a faceface with one Nb(1)O6 octahedra, faces with two equivalent Ta(3)O6 octahedra, and faces with two equivalent Ta(4)O6 octahedra. In the third K site, K(3) is bonded to one O(13), one O(9), two equivalent O(11), two equivalent O(5), two equivalent O(6), two equivalent O(7), and two equivalent O(8) atoms to form KO12 cuboctahedra that share corners with four equivalent K(1)O12 cuboctahedra, corners with eight equivalent Na(2)O12 cuboctahedra, faces with two equivalent K(4)O12 cuboctahedra, faces with four equivalent K(2)O12 cuboctahedra,  a faceface with one Ta(1)O6 octahedra,  a faceface with one Ta(2)O6 octahedra,  a faceface with one Ta(5)O6 octahedra,  a faceface with one Nb(1)O6 octahedra, faces with two equivalent Ta(3)O6 octahedra, and faces with two equivalent Ta(4)O6 octahedra. In the fourth K site, K(4) is bonded to one O(10), one O(14), two equivalent O(12), two equivalent O(5), two equivalent O(6), two equivalent O(7), and two equivalent O(8) atoms to form KO12 cuboctahedra that share corners with four equivalent Na(1)O12 cuboctahedra, corners with eight equivalent K(2)O12 cuboctahedra, faces with two equivalent K(3)O12 cuboctahedra, faces with four equivalent Na(2)O12 cuboctahedra,  a faceface with one Ta(1)O6 octahedra,  a faceface with one Ta(2)O6 octahedra,  a faceface with one Ta(5)O6 octahedra,  a faceface with one Nb(1)O6 octahedra, faces with two equivalent Ta(3)O6 octahedra, and faces with two equivalent Ta(4)O6 octahedra. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(10), one O(14), two equivalent O(1), two equivalent O(12), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form NaO12 cuboctahedra that share corners with four equivalent K(4)O12 cuboctahedra, corners with eight equivalent K(2)O12 cuboctahedra, faces with two equivalent K(1)O12 cuboctahedra, faces with four equivalent Na(2)O12 cuboctahedra,  a faceface with one Ta(1)O6 octahedra,  a faceface with one Ta(2)O6 octahedra,  a faceface with one Ta(5)O6 octahedra,  a faceface with one Nb(1)O6 octahedra, faces with two equivalent Ta(3)O6 octahedra, and faces with two equivalent Ta(4)O6 octahedra. In the second Na site, Na(2) is bonded to one O(1), one O(10), one O(14), one O(2), one O(3), one O(4), one O(5), one O(6), one O(7), one O(8), and two equivalent O(12) atoms to form NaO12 cuboctahedra that share corners with four equivalent K(1)O12 cuboctahedra, corners with four equivalent K(3)O12 cuboctahedra, corners with four equivalent Na(2)O12 cuboctahedra, faces with two equivalent K(2)O12 cuboctahedra, faces with two equivalent K(4)O12 cuboctahedra, faces with two equivalent Na(1)O12 cuboctahedra,  a faceface with one Ta(1)O6 octahedra,  a faceface with one Ta(2)O6 octahedra,  a faceface with one Ta(5)O6 octahedra,  a faceface with one Nb(1)O6 octahedra, faces with two equivalent Ta(3)O6 octahedra, and faces with two equivalent Ta(4)O6 octahedra. There are five inequivalent Ta sites. In the first Ta site, Ta(1) is bonded to one O(10), one O(9), two equivalent O(1), and two equivalent O(5) atoms to form TaO6 octahedra that share corners with two equivalent Ta(2)O6 octahedra, corners with four equivalent Ta(3)O6 octahedra,  a faceface with one K(1)O12 cuboctahedra,  a faceface with one K(3)O12 cuboctahedra,  a faceface with one K(4)O12 cuboctahedra,  a faceface with one Na(1)O12 cuboctahedra, faces with two equivalent K(2)O12 cuboctahedra, and faces with two equivalent Na(2)O12 cuboctahedra. The corner-sharing octahedra are not tilted. In the second Ta site, Ta(2) is bonded to one O(10), one O(9), two equivalent O(2), and two equivalent O(6) atoms to form TaO6 octahedra that share corners with two equivalent Ta(1)O6 octahedra, corners with four equivalent Ta(4)O6 octahedra,  a faceface with one K(1)O12 cuboctahedra,  a faceface with one K(3)O12 cuboctahedra,  a faceface with one K(4)O12 cuboctahedra,  a faceface with one Na(1)O12 cuboctahedra, faces with two equivalent K(2)O12 cuboctahedra, and faces with two equivalent Na(2)O12 cuboctahedra. The corner-sharing octahedra are not tilted. In the third Ta site, Ta(3) is bonded to one O(1), one O(11), one O(12), one O(3), one O(5), and one O(7) atom to form TaO6 octahedra that share corners with two equivalent Ta(1)O6 octahedra, corners with two equivalent Ta(4)O6 octahedra, corners with two equivalent Ta(5)O6 octahedra,  a faceface with one K(1)O12 cuboctahedra,  a faceface with one K(3)O12 cuboctahedra,  a faceface with one K(4)O12 cuboctahedra,  a faceface with one Na(1)O12 cuboctahedra, faces with two equivalent K(2)O12 cuboctahedra, and faces with two equivalent Na(2)O12 cuboctahedra. The corner-sharing octahedra are not tilted. In the fourth Ta site, Ta(4) is bonded to one O(11), one O(12), one O(2), one O(4), one O(6), and one O(8) atom to form TaO6 octahedra that share corners with two equivalent Ta(2)O6 octahedra, corners with two equivalent Ta(3)O6 octahedra, corners with two equivalent Nb(1)O6 octahedra,  a faceface with one K(1)O12 cuboctahedra,  a faceface with one K(3)O12 cuboctahedra,  a faceface with one K(4)O12 cuboctahedra,  a faceface with one Na(1)O12 cuboctahedra, faces with two equivalent K(2)O12 cuboctahedra, and faces with two equivalent Na(2)O12 cuboctahedra. The corner-sharing octahedra are not tilted. In the fifth Ta site, Ta(5) is bonded to one O(13), one O(14), two equivalent O(3), and two equivalent O(7) atoms to form TaO6 octahedra that share corners with two equivalent Nb(1)O6 octahedra, corners with four equivalent Ta(3)O6 octahedra,  a faceface with one K(1)O12 cuboctahedra,  a faceface with one K(3)O12 cuboctahedra,  a faceface with one K(4)O12 cuboctahedra,  a faceface with one Na(1)O12 cuboctahedra, faces with two equivalent K(2)O12 cuboctahedra, and faces with two equivalent Na(2)O12 cuboctahedra. The corner-sharing octahedra are not tilted. Nb(1) is bonded to one O(13), one O(14), two equivalent O(4), and two equivalent O(8) atoms to form NbO6 octahedra that share corners with two equivalent Ta(5)O6 octahedra, corners with four equivalent Ta(4)O6 octahedra,  a faceface with one K(1)O12 cuboctahedra,  a faceface with one K(3)O12 cuboctahedra,  a faceface with one K(4)O12 cuboctahedra,  a faceface with one Na(1)O12 cuboctahedra, faces with two equivalent K(2)O12 cuboctahedra, and faces with two equivalent Na(2)O12 cuboctahedra. The corner-sharing octahedra are not tilted. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to one K(1), one K(2), one Na(1), one Na(2), one Ta(1), and one Ta(3) atom. In the second O site, O(2) is bonded in a distorted linear geometry to one K(1), one K(2), one Na(1), one Na(2), one Ta(2), and one Ta(4) atom. In the third O site, O(3) is bonded in a distorted linear geometry to one K(1), one K(2), one Na(1), one Na(2), one Ta(3), and one Ta(5) atom. In the fourth O site, O(4) is bonded in a distorted linear geometry to one K(1), one K(2), one Na(1), one Na(2), one Ta(4), and one Nb(1) atom. In the fifth O site, O(5) is bonded in a distorted linear geometry to one K(2), one K(3), one K(4), one Na(2), one Ta(1), and one Ta(3) atom. In the sixth O site, O(6) is bonded in a distorted linear geometry to one K(2), one K(3), one K(4), one Na(2), one Ta(2), and one Ta(4) atom. In the seventh O site, O(7) is bonded in a distorted linear geometry to one K(2), one K(3), one K(4), one Na(2), one Ta(3), and one Ta(5) atom. In the eighth O site, O(8) is bonded in a distorted linear geometry to one K(2), one K(3), one K(4), one Na(2), one Ta(4), and one Nb(1) atom. In the ninth O site, O(9) is bonded in a distorted linear geometry to one K(1), one K(3), two equivalent K(2), one Ta(1), and one Ta(2) atom. In the tenth O site, O(10) is bonded in a distorted linear geometry to one K(4), one Na(1), two equivalent Na(2), one Ta(1), and one Ta(2) atom. In the eleventh O site, O(11) is bonded in a distorted linear geometry to one K(1), one K(3), two equivalent K(2), one Ta(3), and one Ta(4) atom. In the twelfth O site, O(12) is bonded in a distorted linear geometry to one K(4), one Na(1), two equivalent Na(2), one Ta(3), and one Ta(4) atom. In the thirteenth O site, O(13) is bonded in a distorted linear geometry to one K(1), one K(3), two equivalent K(2), one Ta(5), and one Nb(1) atom. In the fourteenth O site, O(14) is bonded in a distorted linear geometry to one K(4), one Na(1), two equivalent Na(2), one Ta(5), and one Nb(1) atom. is represented by the CIF file [CIF]
data_K5Na3Ta7NbO24
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.024
_cell_length_b   8.024
_cell_length_c   8.024
_cell_angle_alpha   89.998
_cell_angle_beta   89.998
_cell_angle_gamma   90.001
_symmetry_Int_Tables_number   1
_cell_volume   516.639
_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  0.750  0.750  0.250  1.0
  K  K1  1  0.250  0.750  0.250  1.0
  K  K2  1  0.750  0.250  0.250  1.0
  K  K3  1  0.250  0.250  0.250  1.0
  K  K4  1  0.250  0.250  0.750  1.0
  Na  Na5  1  0.750  0.750  0.750  1.0
  Na  Na6  1  0.250  0.750  0.750  1.0
  Na  Na7  1  0.750  0.250  0.750  1.0
  Ta  Ta8  1  1.000  1.000  0.999  1.0
  Ta  Ta9  1  1.000  1.000  0.501  1.0
  Ta  Ta10  1  0.500  1.000  0.999  1.0
  Ta  Ta11  1  0.500  1.000  0.501  1.0
  Ta  Ta12  1  1.000  0.500  0.999  1.0
  Ta  Ta13  1  1.000  0.500  0.501  1.0
  Ta  Ta14  1  0.500  0.500  0.999  1.0
  Nb  Nb15  1  0.500  0.500  0.501  1.0
  O  O16  1  1.000  0.750  0.998  1.0
  O  O17  1  1.000  0.750  0.502  1.0
  O  O18  1  0.500  0.750  0.998  1.0
  O  O19  1  0.500  0.751  0.502  1.0
  O  O20  1  0.999  0.250  0.999  1.0
  O  O21  1  0.999  0.250  0.501  1.0
  O  O22  1  0.501  0.250  0.999  1.0
  O  O23  1  0.501  0.249  0.501  1.0
  O  O24  1  0.750  1.000  0.998  1.0
  O  O25  1  0.750  1.000  0.502  1.0
  O  O26  1  0.250  0.999  0.999  1.0
  O  O27  1  0.250  0.999  0.501  1.0
  O  O28  1  0.750  0.500  0.998  1.0
  O  O29  1  0.751  0.500  0.502  1.0
  O  O30  1  0.250  0.501  0.999  1.0
  O  O31  1  0.249  0.501  0.501  1.0
  O  O32  1  1.000  1.000  0.250  1.0
  O  O33  1  0.999  0.999  0.750  1.0
  O  O34  1  0.500  1.000  0.250  1.0
  O  O35  1  0.501  0.999  0.750  1.0
  O  O36  1  1.000  0.500  0.250  1.0
  O  O37  1  0.999  0.501  0.750  1.0
  O  O38  1  0.500  0.500  0.249  1.0
  O  O39  1  0.501  0.501  0.751  1.0
[/CIF]
.
The structure described by K5Na3Ta7NbO24 is (Cubic) Perovskite-derived structured and crystallizes in the monoclinic Cm space group. There are four inequivalent K sites. In the first K site, K(1) is bonded to one O(13), one O(9), two equivalent O(1), two equivalent O(11), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form KO12 cuboctahedra that share corners with four equivalent K(3)O12 cuboctahedra, corners with eight equivalent Na(2)O12 cuboctahedra, faces with two equivalent Na(1)O12 cuboctahedra, faces with four equivalent K(2)O12 cuboctahedra,  a faceface with one Ta(1)O6 octahedra,  a faceface with one Ta(2)O6 octahedra,  a faceface with one Ta(5)O6 octahedra,  a faceface with one Nb(1)O6 octahedra, faces with two equivalent Ta(3)O6 octahedra, and faces with two equivalent Ta(4)O6 octahedra. In the second K site, K(2) is bonded to one O(1), one O(13), one O(2), one O(3), one O(4), one O(5), one O(6), one O(7), one O(8), one O(9), and two equivalent O(11) atoms to form KO12 cuboctahedra that share corners with four equivalent K(2)O12 cuboctahedra, corners with four equivalent K(4)O12 cuboctahedra, corners with four equivalent Na(1)O12 cuboctahedra, faces with two equivalent K(1)O12 cuboctahedra, faces with two equivalent K(3)O12 cuboctahedra, faces with two equivalent Na(2)O12 cuboctahedra,  a faceface with one Ta(1)O6 octahedra,  a faceface with one Ta(2)O6 octahedra,  a faceface with one Ta(5)O6 octahedra,  a faceface with one Nb(1)O6 octahedra, faces with two equivalent Ta(3)O6 octahedra, and faces with two equivalent Ta(4)O6 octahedra. In the third K site, K(3) is bonded to one O(13), one O(9), two equivalent O(11), two equivalent O(5), two equivalent O(6), two equivalent O(7), and two equivalent O(8) atoms to form KO12 cuboctahedra that share corners with four equivalent K(1)O12 cuboctahedra, corners with eight equivalent Na(2)O12 cuboctahedra, faces with two equivalent K(4)O12 cuboctahedra, faces with four equivalent K(2)O12 cuboctahedra,  a faceface with one Ta(1)O6 octahedra,  a faceface with one Ta(2)O6 octahedra,  a faceface with one Ta(5)O6 octahedra,  a faceface with one Nb(1)O6 octahedra, faces with two equivalent Ta(3)O6 octahedra, and faces with two equivalent Ta(4)O6 octahedra. In the fourth K site, K(4) is bonded to one O(10), one O(14), two equivalent O(12), two equivalent O(5), two equivalent O(6), two equivalent O(7), and two equivalent O(8) atoms to form KO12 cuboctahedra that share corners with four equivalent Na(1)O12 cuboctahedra, corners with eight equivalent K(2)O12 cuboctahedra, faces with two equivalent K(3)O12 cuboctahedra, faces with four equivalent Na(2)O12 cuboctahedra,  a faceface with one Ta(1)O6 octahedra,  a faceface with one Ta(2)O6 octahedra,  a faceface with one Ta(5)O6 octahedra,  a faceface with one Nb(1)O6 octahedra, faces with two equivalent Ta(3)O6 octahedra, and faces with two equivalent Ta(4)O6 octahedra. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(10), one O(14), two equivalent O(1), two equivalent O(12), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form NaO12 cuboctahedra that share corners with four equivalent K(4)O12 cuboctahedra, corners with eight equivalent K(2)O12 cuboctahedra, faces with two equivalent K(1)O12 cuboctahedra, faces with four equivalent Na(2)O12 cuboctahedra,  a faceface with one Ta(1)O6 octahedra,  a faceface with one Ta(2)O6 octahedra,  a faceface with one Ta(5)O6 octahedra,  a faceface with one Nb(1)O6 octahedra, faces with two equivalent Ta(3)O6 octahedra, and faces with two equivalent Ta(4)O6 octahedra. In the second Na site, Na(2) is bonded to one O(1), one O(10), one O(14), one O(2), one O(3), one O(4), one O(5), one O(6), one O(7), one O(8), and two equivalent O(12) atoms to form NaO12 cuboctahedra that share corners with four equivalent K(1)O12 cuboctahedra, corners with four equivalent K(3)O12 cuboctahedra, corners with four equivalent Na(2)O12 cuboctahedra, faces with two equivalent K(2)O12 cuboctahedra, faces with two equivalent K(4)O12 cuboctahedra, faces with two equivalent Na(1)O12 cuboctahedra,  a faceface with one Ta(1)O6 octahedra,  a faceface with one Ta(2)O6 octahedra,  a faceface with one Ta(5)O6 octahedra,  a faceface with one Nb(1)O6 octahedra, faces with two equivalent Ta(3)O6 octahedra, and faces with two equivalent Ta(4)O6 octahedra. There are five inequivalent Ta sites. In the first Ta site, Ta(1) is bonded to one O(10), one O(9), two equivalent O(1), and two equivalent O(5) atoms to form TaO6 octahedra that share corners with two equivalent Ta(2)O6 octahedra, corners with four equivalent Ta(3)O6 octahedra,  a faceface with one K(1)O12 cuboctahedra,  a faceface with one K(3)O12 cuboctahedra,  a faceface with one K(4)O12 cuboctahedra,  a faceface with one Na(1)O12 cuboctahedra, faces with two equivalent K(2)O12 cuboctahedra, and faces with two equivalent Na(2)O12 cuboctahedra. The corner-sharing octahedra are not tilted. In the second Ta site, Ta(2) is bonded to one O(10), one O(9), two equivalent O(2), and two equivalent O(6) atoms to form TaO6 octahedra that share corners with two equivalent Ta(1)O6 octahedra, corners with four equivalent Ta(4)O6 octahedra,  a faceface with one K(1)O12 cuboctahedra,  a faceface with one K(3)O12 cuboctahedra,  a faceface with one K(4)O12 cuboctahedra,  a faceface with one Na(1)O12 cuboctahedra, faces with two equivalent K(2)O12 cuboctahedra, and faces with two equivalent Na(2)O12 cuboctahedra. The corner-sharing octahedra are not tilted. In the third Ta site, Ta(3) is bonded to one O(1), one O(11), one O(12), one O(3), one O(5), and one O(7) atom to form TaO6 octahedra that share corners with two equivalent Ta(1)O6 octahedra, corners with two equivalent Ta(4)O6 octahedra, corners with two equivalent Ta(5)O6 octahedra,  a faceface with one K(1)O12 cuboctahedra,  a faceface with one K(3)O12 cuboctahedra,  a faceface with one K(4)O12 cuboctahedra,  a faceface with one Na(1)O12 cuboctahedra, faces with two equivalent K(2)O12 cuboctahedra, and faces with two equivalent Na(2)O12 cuboctahedra. The corner-sharing octahedra are not tilted. In the fourth Ta site, Ta(4) is bonded to one O(11), one O(12), one O(2), one O(4), one O(6), and one O(8) atom to form TaO6 octahedra that share corners with two equivalent Ta(2)O6 octahedra, corners with two equivalent Ta(3)O6 octahedra, corners with two equivalent Nb(1)O6 octahedra,  a faceface with one K(1)O12 cuboctahedra,  a faceface with one K(3)O12 cuboctahedra,  a faceface with one K(4)O12 cuboctahedra,  a faceface with one Na(1)O12 cuboctahedra, faces with two equivalent K(2)O12 cuboctahedra, and faces with two equivalent Na(2)O12 cuboctahedra. The corner-sharing octahedra are not tilted. In the fifth Ta site, Ta(5) is bonded to one O(13), one O(14), two equivalent O(3), and two equivalent O(7) atoms to form TaO6 octahedra that share corners with two equivalent Nb(1)O6 octahedra, corners with four equivalent Ta(3)O6 octahedra,  a faceface with one K(1)O12 cuboctahedra,  a faceface with one K(3)O12 cuboctahedra,  a faceface with one K(4)O12 cuboctahedra,  a faceface with one Na(1)O12 cuboctahedra, faces with two equivalent K(2)O12 cuboctahedra, and faces with two equivalent Na(2)O12 cuboctahedra. The corner-sharing octahedra are not tilted. Nb(1) is bonded to one O(13), one O(14), two equivalent O(4), and two equivalent O(8) atoms to form NbO6 octahedra that share corners with two equivalent Ta(5)O6 octahedra, corners with four equivalent Ta(4)O6 octahedra,  a faceface with one K(1)O12 cuboctahedra,  a faceface with one K(3)O12 cuboctahedra,  a faceface with one K(4)O12 cuboctahedra,  a faceface with one Na(1)O12 cuboctahedra, faces with two equivalent K(2)O12 cuboctahedra, and faces with two equivalent Na(2)O12 cuboctahedra. The corner-sharing octahedra are not tilted. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to one K(1), one K(2), one Na(1), one Na(2), one Ta(1), and one Ta(3) atom. In the second O site, O(2) is bonded in a distorted linear geometry to one K(1), one K(2), one Na(1), one Na(2), one Ta(2), and one Ta(4) atom. In the third O site, O(3) is bonded in a distorted linear geometry to one K(1), one K(2), one Na(1), one Na(2), one Ta(3), and one Ta(5) atom. In the fourth O site, O(4) is bonded in a distorted linear geometry to one K(1), one K(2), one Na(1), one Na(2), one Ta(4), and one Nb(1) atom. In the fifth O site, O(5) is bonded in a distorted linear geometry to one K(2), one K(3), one K(4), one Na(2), one Ta(1), and one Ta(3) atom. In the sixth O site, O(6) is bonded in a distorted linear geometry to one K(2), one K(3), one K(4), one Na(2), one Ta(2), and one Ta(4) atom. In the seventh O site, O(7) is bonded in a distorted linear geometry to one K(2), one K(3), one K(4), one Na(2), one Ta(3), and one Ta(5) atom. In the eighth O site, O(8) is bonded in a distorted linear geometry to one K(2), one K(3), one K(4), one Na(2), one Ta(4), and one Nb(1) atom. In the ninth O site, O(9) is bonded in a distorted linear geometry to one K(1), one K(3), two equivalent K(2), one Ta(1), and one Ta(2) atom. In the tenth O site, O(10) is bonded in a distorted linear geometry to one K(4), one Na(1), two equivalent Na(2), one Ta(1), and one Ta(2) atom. In the eleventh O site, O(11) is bonded in a distorted linear geometry to one K(1), one K(3), two equivalent K(2), one Ta(3), and one Ta(4) atom. In the twelfth O site, O(12) is bonded in a distorted linear geometry to one K(4), one Na(1), two equivalent Na(2), one Ta(3), and one Ta(4) atom. In the thirteenth O site, O(13) is bonded in a distorted linear geometry to one K(1), one K(3), two equivalent K(2), one Ta(5), and one Nb(1) atom. In the fourteenth O site, O(14) is bonded in a distorted linear geometry to one K(4), one Na(1), two equivalent Na(2), one Ta(5), and one Nb(1) atom. is represented by the CIF file [CIF]
data_K5Na3Ta7NbO24
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.024
_cell_length_b   8.024
_cell_length_c   8.024
_cell_angle_alpha   89.998
_cell_angle_beta   89.998
_cell_angle_gamma   90.001
_symmetry_Int_Tables_number   1
_cell_volume   516.639
_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  0.750  0.750  0.250  1.0
  K  K1  1  0.250  0.750  0.250  1.0
  K  K2  1  0.750  0.250  0.250  1.0
  K  K3  1  0.250  0.250  0.250  1.0
  K  K4  1  0.250  0.250  0.750  1.0
  Na  Na5  1  0.750  0.750  0.750  1.0
  Na  Na6  1  0.250  0.750  0.750  1.0
  Na  Na7  1  0.750  0.250  0.750  1.0
  Ta  Ta8  1  1.000  1.000  0.999  1.0
  Ta  Ta9  1  1.000  1.000  0.501  1.0
  Ta  Ta10  1  0.500  1.000  0.999  1.0
  Ta  Ta11  1  0.500  1.000  0.501  1.0
  Ta  Ta12  1  1.000  0.500  0.999  1.0
  Ta  Ta13  1  1.000  0.500  0.501  1.0
  Ta  Ta14  1  0.500  0.500  0.999  1.0
  Nb  Nb15  1  0.500  0.500  0.501  1.0
  O  O16  1  1.000  0.750  0.998  1.0
  O  O17  1  1.000  0.750  0.502  1.0
  O  O18  1  0.500  0.750  0.998  1.0
  O  O19  1  0.500  0.751  0.502  1.0
  O  O20  1  0.999  0.250  0.999  1.0
  O  O21  1  0.999  0.250  0.501  1.0
  O  O22  1  0.501  0.250  0.999  1.0
  O  O23  1  0.501  0.249  0.501  1.0
  O  O24  1  0.750  1.000  0.998  1.0
  O  O25  1  0.750  1.000  0.502  1.0
  O  O26  1  0.250  0.999  0.999  1.0
  O  O27  1  0.250  0.999  0.501  1.0
  O  O28  1  0.750  0.500  0.998  1.0
  O  O29  1  0.751  0.500  0.502  1.0
  O  O30  1  0.250  0.501  0.999  1.0
  O  O31  1  0.249  0.501  0.501  1.0
  O  O32  1  1.000  1.000  0.250  1.0
  O  O33  1  0.999  0.999  0.750  1.0
  O  O34  1  0.500  1.000  0.250  1.0
  O  O35  1  0.501  0.999  0.750  1.0
  O  O36  1  1.000  0.500  0.250  1.0
  O  O37  1  0.999  0.501  0.750  1.0
  O  O38  1  0.500  0.500  0.249  1.0
  O  O39  1  0.501  0.501  0.751  1.0
[/CIF]
.