The crystal structure described by TaNb(AgO3)2 is Orthorhombic Perovskite-derived structured and crystallizes in the orthorhombic P2_12_12 space group. Ta(1) is bonded to one O(1), one O(2), one O(4), one O(5), one O(6), and one O(7) atom to form TaO6 octahedra that share  a cornercorner with one Ta(1)O6 octahedra and corners with five equivalent Nb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 16-24°. Nb(1) is bonded to one O(1), one O(2), one O(3), one O(5), one O(6), and one O(7) atom to form NbO6 octahedra that share  a cornercorner with one Nb(1)O6 octahedra and corners with five equivalent Ta(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 16-24°. There are three inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a distorted trigonal planar geometry to one O(4) and two equivalent O(2) atoms. In the second Ag site, Ag(2) is bonded in a distorted trigonal planar geometry to one O(3) and two equivalent O(1) atoms. In the third Ag site, Ag(3) is bonded in a 8-coordinate geometry to one O(1), one O(2), two equivalent O(5), two equivalent O(6), and two equivalent O(7) atoms. There are seven inequivalent O sites. In the first O site, O(6) is bonded in a 3-coordinate geometry to one Ta(1), one Nb(1), and two equivalent Ag(3) atoms. In the second O site, O(7) is bonded in a 3-coordinate geometry to one Ta(1), one Nb(1), and two equivalent Ag(3) atoms. In the third O site, O(1) is bonded in a 3-coordinate geometry to one Ta(1), one Nb(1), one Ag(2), and one Ag(3) atom. In the fourth O site, O(2) is bonded in a 3-coordinate geometry to one Ta(1), one Nb(1), one Ag(1), and one Ag(3) atom. In the fifth O site, O(3) is bonded in a 3-coordinate geometry to two equivalent Nb(1) and one Ag(2) atom. In the sixth O site, O(4) is bonded in a 3-coordinate geometry to two equivalent Ta(1) and one Ag(1) atom. In the seventh O site, O(5) is bonded in a 4-coordinate geometry to one Ta(1), one Nb(1), and two equivalent Ag(3) atoms. is represented by the CIF file [CIF]
data_TaNb(AgO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.614
_cell_length_b   5.687
_cell_length_c   15.852
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   506.100
_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
  Ta  Ta0  1  0.253  0.981  0.875  1.0
  Ta  Ta1  1  0.747  0.519  0.375  1.0
  Ta  Ta2  1  0.253  0.019  0.125  1.0
  Ta  Ta3  1  0.747  0.481  0.625  1.0
  Nb  Nb4  1  0.747  0.519  0.125  1.0
  Nb  Nb5  1  0.253  0.981  0.625  1.0
  Nb  Nb6  1  0.747  0.481  0.875  1.0
  Nb  Nb7  1  0.253  0.019  0.375  1.0
  Ag  Ag8  1  0.748  0.000  0.000  1.0
  Ag  Ag9  1  0.252  0.500  0.500  1.0
  Ag  Ag10  1  0.250  0.500  0.000  1.0
  Ag  Ag11  1  0.750  0.000  0.500  1.0
  Ag  Ag12  1  0.753  0.013  0.250  1.0
  Ag  Ag13  1  0.247  0.487  0.750  1.0
  Ag  Ag14  1  0.753  0.987  0.750  1.0
  Ag  Ag15  1  0.247  0.513  0.250  1.0
  O  O16  1  0.466  0.715  0.111  1.0
  O  O17  1  0.534  0.785  0.611  1.0
  O  O18  1  0.466  0.285  0.889  1.0
  O  O19  1  0.534  0.215  0.389  1.0
  O  O20  1  0.532  0.787  0.889  1.0
  O  O21  1  0.468  0.713  0.389  1.0
  O  O22  1  0.532  0.213  0.111  1.0
  O  O23  1  0.468  0.287  0.611  1.0
  O  O24  1  0.808  0.500  0.000  1.0
  O  O25  1  0.192  0.000  0.500  1.0
  O  O26  1  0.193  0.000  0.000  1.0
  O  O27  1  0.807  0.500  0.500  1.0
  O  O28  1  0.692  0.482  0.251  1.0
  O  O29  1  0.308  0.018  0.751  1.0
  O  O30  1  0.692  0.518  0.749  1.0
  O  O31  1  0.308  0.982  0.249  1.0
  O  O32  1  0.968  0.778  0.140  1.0
  O  O33  1  0.032  0.722  0.640  1.0
  O  O34  1  0.968  0.222  0.860  1.0
  O  O35  1  0.032  0.278  0.360  1.0
  O  O36  1  0.034  0.724  0.860  1.0
  O  O37  1  0.966  0.776  0.360  1.0
  O  O38  1  0.034  0.276  0.140  1.0
  O  O39  1  0.966  0.224  0.640  1.0
[/CIF]
.
The crystal structure described by TaNb(AgO3)2 is Orthorhombic Perovskite-derived structured and crystallizes in the orthorhombic P2_12_12 space group. Ta(1) is bonded to one O(1), one O(2), one O(4), one O(5), one O(6), and one O(7) atom to form TaO6 octahedra that share  a cornercorner with one Ta(1)O6 octahedra and corners with five equivalent Nb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 16-24°. Nb(1) is bonded to one O(1), one O(2), one O(3), one O(5), one O(6), and one O(7) atom to form NbO6 octahedra that share  a cornercorner with one Nb(1)O6 octahedra and corners with five equivalent Ta(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 16-24°. There are three inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a distorted trigonal planar geometry to one O(4) and two equivalent O(2) atoms. In the second Ag site, Ag(2) is bonded in a distorted trigonal planar geometry to one O(3) and two equivalent O(1) atoms. In the third Ag site, Ag(3) is bonded in a 8-coordinate geometry to one O(1), one O(2), two equivalent O(5), two equivalent O(6), and two equivalent O(7) atoms. There are seven inequivalent O sites. In the first O site, O(6) is bonded in a 3-coordinate geometry to one Ta(1), one Nb(1), and two equivalent Ag(3) atoms. In the second O site, O(7) is bonded in a 3-coordinate geometry to one Ta(1), one Nb(1), and two equivalent Ag(3) atoms. In the third O site, O(1) is bonded in a 3-coordinate geometry to one Ta(1), one Nb(1), one Ag(2), and one Ag(3) atom. In the fourth O site, O(2) is bonded in a 3-coordinate geometry to one Ta(1), one Nb(1), one Ag(1), and one Ag(3) atom. In the fifth O site, O(3) is bonded in a 3-coordinate geometry to two equivalent Nb(1) and one Ag(2) atom. In the sixth O site, O(4) is bonded in a 3-coordinate geometry to two equivalent Ta(1) and one Ag(1) atom. In the seventh O site, O(5) is bonded in a 4-coordinate geometry to one Ta(1), one Nb(1), and two equivalent Ag(3) atoms. is represented by the CIF file [CIF]
data_TaNb(AgO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.614
_cell_length_b   5.687
_cell_length_c   15.852
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   506.100
_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
  Ta  Ta0  1  0.253  0.981  0.875  1.0
  Ta  Ta1  1  0.747  0.519  0.375  1.0
  Ta  Ta2  1  0.253  0.019  0.125  1.0
  Ta  Ta3  1  0.747  0.481  0.625  1.0
  Nb  Nb4  1  0.747  0.519  0.125  1.0
  Nb  Nb5  1  0.253  0.981  0.625  1.0
  Nb  Nb6  1  0.747  0.481  0.875  1.0
  Nb  Nb7  1  0.253  0.019  0.375  1.0
  Ag  Ag8  1  0.748  0.000  0.000  1.0
  Ag  Ag9  1  0.252  0.500  0.500  1.0
  Ag  Ag10  1  0.250  0.500  0.000  1.0
  Ag  Ag11  1  0.750  0.000  0.500  1.0
  Ag  Ag12  1  0.753  0.013  0.250  1.0
  Ag  Ag13  1  0.247  0.487  0.750  1.0
  Ag  Ag14  1  0.753  0.987  0.750  1.0
  Ag  Ag15  1  0.247  0.513  0.250  1.0
  O  O16  1  0.466  0.715  0.111  1.0
  O  O17  1  0.534  0.785  0.611  1.0
  O  O18  1  0.466  0.285  0.889  1.0
  O  O19  1  0.534  0.215  0.389  1.0
  O  O20  1  0.532  0.787  0.889  1.0
  O  O21  1  0.468  0.713  0.389  1.0
  O  O22  1  0.532  0.213  0.111  1.0
  O  O23  1  0.468  0.287  0.611  1.0
  O  O24  1  0.808  0.500  0.000  1.0
  O  O25  1  0.192  0.000  0.500  1.0
  O  O26  1  0.193  0.000  0.000  1.0
  O  O27  1  0.807  0.500  0.500  1.0
  O  O28  1  0.692  0.482  0.251  1.0
  O  O29  1  0.308  0.018  0.751  1.0
  O  O30  1  0.692  0.518  0.749  1.0
  O  O31  1  0.308  0.982  0.249  1.0
  O  O32  1  0.968  0.778  0.140  1.0
  O  O33  1  0.032  0.722  0.640  1.0
  O  O34  1  0.968  0.222  0.860  1.0
  O  O35  1  0.032  0.278  0.360  1.0
  O  O36  1  0.034  0.724  0.860  1.0
  O  O37  1  0.966  0.776  0.360  1.0
  O  O38  1  0.034  0.276  0.140  1.0
  O  O39  1  0.966  0.224  0.640  1.0
[/CIF]
.