The material described by K2Nb6Ag(PO8)3 crystallizes in the monoclinic C2 space group. K(1) is bonded in a 5-coordinate geometry to one O(1), one O(10), one O(12), one O(5), and one O(6) atom. There are three inequivalent Nb sites. In the first Nb site, Nb(1) is bonded to one O(12), one O(13), one O(2), one O(5), one O(7), and one O(9) atom to form NbO6 octahedra that share  a cornercorner with one Nb(1)O6 octahedra,  a cornercorner with one Nb(3)O6 octahedra, corners with two equivalent Nb(2)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra, and  a cornercorner with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 4-35°. In the second Nb site, Nb(2) is bonded to one O(1), one O(10), one O(2), one O(5), one O(6), and one O(8) atom to form NbO6 octahedra that share corners with two equivalent Nb(1)O6 octahedra, corners with two equivalent Nb(3)O6 octahedra, and corners with two equivalent P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 4-37°. In the third Nb site, Nb(3) is bonded to one O(1), one O(10), one O(11), one O(3), one O(4), and one O(9) atom to form NbO6 octahedra that share  a cornercorner with one Nb(1)O6 octahedra,  a cornercorner with one Nb(3)O6 octahedra, corners with two equivalent Nb(2)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra, and  a cornercorner with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 3-37°. Ag(1) is bonded in a 6-coordinate geometry to two equivalent O(11), two equivalent O(7), and two equivalent O(8) atoms. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(3), one O(6), one O(7), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Nb(1)O6 octahedra,  a cornercorner with one Nb(3)O6 octahedra, and corners with two equivalent Nb(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 36-43°. In the second P site, P(2) is bonded to two equivalent O(11) and two equivalent O(12) atoms to form PO4 tetrahedra that share corners with two equivalent Nb(1)O6 octahedra and corners with two equivalent Nb(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 38-42°. There are thirteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one K(1), one Nb(2), and one Nb(3) atom. In the second O site, O(2) is bonded in a linear geometry to one Nb(1) and one Nb(2) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Nb(3) and one P(1) atom. In the fourth O site, O(4) is bonded in a linear geometry to two equivalent Nb(3) atoms. In the fifth O site, O(5) is bonded in a distorted bent 150 degrees geometry to one K(1), one Nb(1), and one Nb(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one K(1), one Nb(2), and one P(1) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Nb(1), one Ag(1), and one P(1) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Nb(2), one Ag(1), and one P(1) atom. In the ninth O site, O(9) is bonded in a bent 150 degrees geometry to one Nb(1) and one Nb(3) atom. In the tenth O site, O(10) is bonded in a distorted bent 150 degrees geometry to one K(1), one Nb(2), and one Nb(3) atom. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one Nb(3), one Ag(1), and one P(2) atom. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to one K(1), one Nb(1), and one P(2) atom. In the thirteenth O site, O(13) is bonded in a bent 150 degrees geometry to two equivalent Nb(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_K2Nb6Ag(PO8)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.578
_cell_length_b   8.578
_cell_length_c   8.643
_cell_angle_alpha   75.413
_cell_angle_beta   75.413
_cell_angle_gamma   104.384
_symmetry_Int_Tables_number   1
_cell_volume   561.624
_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  0.170  0.477  0.220  1.0
  K  K1  1  0.523  0.830  0.780  1.0
  Nb  Nb2  1  0.152  0.034  0.649  1.0
  Nb  Nb3  1  0.355  0.155  0.961  1.0
  Nb  Nb4  1  0.845  0.645  0.039  1.0
  Nb  Nb5  1  0.037  0.352  0.846  1.0
  Nb  Nb6  1  0.966  0.848  0.351  1.0
  Nb  Nb7  1  0.648  0.963  0.154  1.0
  Ag  Ag8  1  0.504  0.496  0.500  1.0
  P  P9  1  0.498  0.269  0.268  1.0
  P  P10  1  0.731  0.502  0.732  1.0
  P  P11  1  0.270  0.730  0.500  1.0
  O  O12  1  0.498  0.021  0.022  1.0
  O  O13  1  0.153  0.002  0.154  1.0
  O  O14  1  0.575  0.125  0.283  1.0
  O  O15  1  0.847  0.153  0.000  1.0
  O  O16  1  0.312  0.067  0.792  1.0
  O  O17  1  0.416  0.289  0.128  1.0
  O  O18  1  0.358  0.236  0.440  1.0
  O  O19  1  0.640  0.440  0.232  1.0
  O  O20  1  0.076  0.213  0.688  1.0
  O  O21  1  0.875  0.425  0.717  1.0
  O  O22  1  0.560  0.360  0.768  1.0
  O  O23  1  0.210  0.316  0.932  1.0
  O  O24  1  0.979  0.502  0.978  1.0
  O  O25  1  0.933  0.688  0.208  1.0
  O  O26  1  0.764  0.642  0.560  1.0
  O  O27  1  0.711  0.584  0.872  1.0
  O  O28  1  0.684  0.790  0.068  1.0
  O  O29  1  0.237  0.560  0.642  1.0
  O  O30  1  0.440  0.763  0.358  1.0
  O  O31  1  0.128  0.710  0.421  1.0
  O  O32  1  0.787  0.924  0.312  1.0
  O  O33  1  0.290  0.872  0.579  1.0
  O  O34  1  0.998  0.847  0.846  1.0
  O  O35  1  0.026  0.974  0.500  1.0
[/CIF]
.
The material described by K2Nb6Ag(PO8)3 crystallizes in the monoclinic C2 space group. K(1) is bonded in a 5-coordinate geometry to one O(1), one O(10), one O(12), one O(5), and one O(6) atom. There are three inequivalent Nb sites. In the first Nb site, Nb(1) is bonded to one O(12), one O(13), one O(2), one O(5), one O(7), and one O(9) atom to form NbO6 octahedra that share  a cornercorner with one Nb(1)O6 octahedra,  a cornercorner with one Nb(3)O6 octahedra, corners with two equivalent Nb(2)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra, and  a cornercorner with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 4-35°. In the second Nb site, Nb(2) is bonded to one O(1), one O(10), one O(2), one O(5), one O(6), and one O(8) atom to form NbO6 octahedra that share corners with two equivalent Nb(1)O6 octahedra, corners with two equivalent Nb(3)O6 octahedra, and corners with two equivalent P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 4-37°. In the third Nb site, Nb(3) is bonded to one O(1), one O(10), one O(11), one O(3), one O(4), and one O(9) atom to form NbO6 octahedra that share  a cornercorner with one Nb(1)O6 octahedra,  a cornercorner with one Nb(3)O6 octahedra, corners with two equivalent Nb(2)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra, and  a cornercorner with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 3-37°. Ag(1) is bonded in a 6-coordinate geometry to two equivalent O(11), two equivalent O(7), and two equivalent O(8) atoms. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(3), one O(6), one O(7), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Nb(1)O6 octahedra,  a cornercorner with one Nb(3)O6 octahedra, and corners with two equivalent Nb(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 36-43°. In the second P site, P(2) is bonded to two equivalent O(11) and two equivalent O(12) atoms to form PO4 tetrahedra that share corners with two equivalent Nb(1)O6 octahedra and corners with two equivalent Nb(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 38-42°. There are thirteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one K(1), one Nb(2), and one Nb(3) atom. In the second O site, O(2) is bonded in a linear geometry to one Nb(1) and one Nb(2) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Nb(3) and one P(1) atom. In the fourth O site, O(4) is bonded in a linear geometry to two equivalent Nb(3) atoms. In the fifth O site, O(5) is bonded in a distorted bent 150 degrees geometry to one K(1), one Nb(1), and one Nb(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one K(1), one Nb(2), and one P(1) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Nb(1), one Ag(1), and one P(1) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Nb(2), one Ag(1), and one P(1) atom. In the ninth O site, O(9) is bonded in a bent 150 degrees geometry to one Nb(1) and one Nb(3) atom. In the tenth O site, O(10) is bonded in a distorted bent 150 degrees geometry to one K(1), one Nb(2), and one Nb(3) atom. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one Nb(3), one Ag(1), and one P(2) atom. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to one K(1), one Nb(1), and one P(2) atom. In the thirteenth O site, O(13) is bonded in a bent 150 degrees geometry to two equivalent Nb(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_K2Nb6Ag(PO8)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.578
_cell_length_b   8.578
_cell_length_c   8.643
_cell_angle_alpha   75.413
_cell_angle_beta   75.413
_cell_angle_gamma   104.384
_symmetry_Int_Tables_number   1
_cell_volume   561.624
_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  0.170  0.477  0.220  1.0
  K  K1  1  0.523  0.830  0.780  1.0
  Nb  Nb2  1  0.152  0.034  0.649  1.0
  Nb  Nb3  1  0.355  0.155  0.961  1.0
  Nb  Nb4  1  0.845  0.645  0.039  1.0
  Nb  Nb5  1  0.037  0.352  0.846  1.0
  Nb  Nb6  1  0.966  0.848  0.351  1.0
  Nb  Nb7  1  0.648  0.963  0.154  1.0
  Ag  Ag8  1  0.504  0.496  0.500  1.0
  P  P9  1  0.498  0.269  0.268  1.0
  P  P10  1  0.731  0.502  0.732  1.0
  P  P11  1  0.270  0.730  0.500  1.0
  O  O12  1  0.498  0.021  0.022  1.0
  O  O13  1  0.153  0.002  0.154  1.0
  O  O14  1  0.575  0.125  0.283  1.0
  O  O15  1  0.847  0.153  0.000  1.0
  O  O16  1  0.312  0.067  0.792  1.0
  O  O17  1  0.416  0.289  0.128  1.0
  O  O18  1  0.358  0.236  0.440  1.0
  O  O19  1  0.640  0.440  0.232  1.0
  O  O20  1  0.076  0.213  0.688  1.0
  O  O21  1  0.875  0.425  0.717  1.0
  O  O22  1  0.560  0.360  0.768  1.0
  O  O23  1  0.210  0.316  0.932  1.0
  O  O24  1  0.979  0.502  0.978  1.0
  O  O25  1  0.933  0.688  0.208  1.0
  O  O26  1  0.764  0.642  0.560  1.0
  O  O27  1  0.711  0.584  0.872  1.0
  O  O28  1  0.684  0.790  0.068  1.0
  O  O29  1  0.237  0.560  0.642  1.0
  O  O30  1  0.440  0.763  0.358  1.0
  O  O31  1  0.128  0.710  0.421  1.0
  O  O32  1  0.787  0.924  0.312  1.0
  O  O33  1  0.290  0.872  0.579  1.0
  O  O34  1  0.998  0.847  0.846  1.0
  O  O35  1  0.026  0.974  0.500  1.0
[/CIF]
.