The crystal structure described by KSb2PO8 crystallizes in the monoclinic Cc space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 9-coordinate geometry to one O(1), one O(14), one O(16), one O(2), one O(3), one O(5), one O(6), one O(8), and one O(9) atom. In the second K site, K(2) is bonded in a 9-coordinate geometry to one O(1), one O(10), one O(13), one O(15), one O(2), one O(4), one O(5), one O(6), and one O(7) atom. There are four inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to one O(1), one O(15), one O(2), one O(4), one O(8), and one O(9) atom to form SbO6 octahedra that share  a cornercorner with one Sb(3)O6 octahedra,  a cornercorner with one Sb(4)O6 octahedra, corners with two equivalent Sb(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 50-52°. In the second Sb site, Sb(2) is bonded to one O(1), one O(10), one O(16), one O(2), one O(3), and one O(7) atom to form SbO6 octahedra that share  a cornercorner with one Sb(3)O6 octahedra,  a cornercorner with one Sb(4)O6 octahedra, corners with two equivalent Sb(1)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 50-51°. In the third Sb site, Sb(3) is bonded to one O(12), one O(14), one O(4), one O(5), one O(6), and one O(7) atom to form SbO6 octahedra that share  a cornercorner with one Sb(1)O6 octahedra,  a cornercorner with one Sb(2)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, and  an edgeedge with one Sb(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 50-52°. In the fourth Sb site, Sb(4) is bonded to one O(11), one O(13), one O(3), one O(5), one O(6), and one O(8) atom to form SbO6 octahedra that share  a cornercorner with one Sb(1)O6 octahedra,  a cornercorner with one Sb(2)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, and  an edgeedge with one Sb(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 50-51°. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(10), one O(11), one O(14), and one O(15) atom to form PO4 tetrahedra that share  a cornercorner with one Sb(1)O6 octahedra,  a cornercorner with one Sb(2)O6 octahedra,  a cornercorner with one Sb(3)O6 octahedra, and  a cornercorner with one Sb(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 26-54°. In the second P site, P(2) is bonded to one O(12), one O(13), one O(16), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one Sb(1)O6 octahedra,  a cornercorner with one Sb(2)O6 octahedra,  a cornercorner with one Sb(3)O6 octahedra, and  a cornercorner with one Sb(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 27-54°. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to one K(1), one K(2), one Sb(1), and one Sb(2) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one K(1), one K(2), one Sb(1), and one Sb(2) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one K(1), one Sb(2), and one Sb(4) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one K(2), one Sb(1), and one Sb(3) atom. In the fifth O site, O(5) is bonded in a 2-coordinate geometry to one K(1), one K(2), one Sb(3), and one Sb(4) atom. In the sixth O site, O(6) is bonded in a 2-coordinate geometry to one K(1), one K(2), one Sb(3), and one Sb(4) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one K(2), one Sb(2), and one Sb(3) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one K(1), one Sb(1), and one Sb(4) atom. In the ninth O site, O(9) is bonded in a 2-coordinate geometry to one K(1), one Sb(1), and one P(2) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one K(2), one Sb(2), and one P(1) atom. In the eleventh O site, O(11) is bonded in a distorted bent 120 degrees geometry to one Sb(4) and one P(1) atom. In the twelfth O site, O(12) is bonded in a distorted bent 120 degrees geometry to one Sb(3) and one P(2) atom. In the thirteenth O site, O(13) is bonded in a distorted bent 150 degrees geometry to one K(2), one Sb(4), and one P(2) atom. In the fourteenth O site, O(14) is bonded in a distorted bent 150 degrees geometry to one K(1), one Sb(3), and one P(1) atom. In the fifteenth O site, O(15) is bonded in a 2-coordinate geometry to one K(2), one Sb(1), and one P(1) atom. In the sixteenth O site, O(16) is bonded in a 2-coordinate geometry to one K(1), one Sb(2), and one P(2) atom. is represented by the CIF file [CIF]
data_KSb2PO8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.222
_cell_length_b   7.222
_cell_length_c   15.261
_cell_angle_alpha   84.820
_cell_angle_beta   84.820
_cell_angle_gamma   59.718
_symmetry_Int_Tables_number   1
_cell_volume   683.712
_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
  K  K0  1  0.091  0.848  0.888  1.0
  K  K1  1  0.848  0.091  0.388  1.0
  K  K2  1  0.908  0.149  0.119  1.0
  K  K3  1  0.149  0.908  0.619  1.0
  Sb  Sb4  1  0.622  0.877  0.748  1.0
  Sb  Sb5  1  0.877  0.622  0.248  1.0
  Sb  Sb6  1  0.379  0.125  0.255  1.0
  Sb  Sb7  1  0.125  0.379  0.755  1.0
  Sb  Sb8  1  0.546  0.810  0.065  1.0
  Sb  Sb9  1  0.810  0.546  0.565  1.0
  Sb  Sb10  1  0.456  0.193  0.938  1.0
  Sb  Sb11  1  0.193  0.456  0.438  1.0
  P  P12  1  0.287  0.513  0.107  1.0
  P  P13  1  0.513  0.287  0.607  1.0
  P  P14  1  0.714  0.489  0.895  1.0
  P  P15  1  0.489  0.714  0.395  1.0
  O  O16  1  0.940  0.696  0.749  1.0
  O  O17  1  0.696  0.940  0.249  1.0
  O  O18  1  0.061  0.305  0.255  1.0
  O  O19  1  0.305  0.061  0.755  1.0
  O  O20  1  0.259  0.414  0.855  1.0
  O  O21  1  0.414  0.259  0.355  1.0
  O  O22  1  0.750  0.587  0.145  1.0
  O  O23  1  0.587  0.750  0.645  1.0
  O  O24  1  0.333  0.003  0.974  1.0
  O  O25  1  0.003  0.333  0.474  1.0
  O  O26  1  0.668  0.002  0.030  1.0
  O  O27  1  0.002  0.668  0.530  1.0
  O  O28  1  0.342  0.980  0.161  1.0
  O  O29  1  0.980  0.342  0.661  1.0
  O  O30  1  0.662  0.017  0.844  1.0
  O  O31  1  0.017  0.662  0.344  1.0
  O  O32  1  0.562  0.660  0.827  1.0
  O  O33  1  0.660  0.562  0.327  1.0
  O  O34  1  0.442  0.337  0.174  1.0
  O  O35  1  0.337  0.442  0.674  1.0
  O  O36  1  0.245  0.408  0.033  1.0
  O  O37  1  0.408  0.245  0.533  1.0
  O  O38  1  0.753  0.597  0.969  1.0
  O  O39  1  0.597  0.753  0.469  1.0
  O  O40  1  0.617  0.356  0.939  1.0
  O  O41  1  0.356  0.617  0.439  1.0
  O  O42  1  0.381  0.651  0.064  1.0
  O  O43  1  0.651  0.381  0.564  1.0
  O  O44  1  0.074  0.674  0.156  1.0
  O  O45  1  0.674  0.074  0.656  1.0
  O  O46  1  0.930  0.328  0.849  1.0
  O  O47  1  0.328  0.930  0.349  1.0
[/CIF]
.
The crystal structure described by KSb2PO8 crystallizes in the monoclinic Cc space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 9-coordinate geometry to one O(1), one O(14), one O(16), one O(2), one O(3), one O(5), one O(6), one O(8), and one O(9) atom. In the second K site, K(2) is bonded in a 9-coordinate geometry to one O(1), one O(10), one O(13), one O(15), one O(2), one O(4), one O(5), one O(6), and one O(7) atom. There are four inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to one O(1), one O(15), one O(2), one O(4), one O(8), and one O(9) atom to form SbO6 octahedra that share  a cornercorner with one Sb(3)O6 octahedra,  a cornercorner with one Sb(4)O6 octahedra, corners with two equivalent Sb(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 50-52°. In the second Sb site, Sb(2) is bonded to one O(1), one O(10), one O(16), one O(2), one O(3), and one O(7) atom to form SbO6 octahedra that share  a cornercorner with one Sb(3)O6 octahedra,  a cornercorner with one Sb(4)O6 octahedra, corners with two equivalent Sb(1)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 50-51°. In the third Sb site, Sb(3) is bonded to one O(12), one O(14), one O(4), one O(5), one O(6), and one O(7) atom to form SbO6 octahedra that share  a cornercorner with one Sb(1)O6 octahedra,  a cornercorner with one Sb(2)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, and  an edgeedge with one Sb(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 50-52°. In the fourth Sb site, Sb(4) is bonded to one O(11), one O(13), one O(3), one O(5), one O(6), and one O(8) atom to form SbO6 octahedra that share  a cornercorner with one Sb(1)O6 octahedra,  a cornercorner with one Sb(2)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, and  an edgeedge with one Sb(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 50-51°. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(10), one O(11), one O(14), and one O(15) atom to form PO4 tetrahedra that share  a cornercorner with one Sb(1)O6 octahedra,  a cornercorner with one Sb(2)O6 octahedra,  a cornercorner with one Sb(3)O6 octahedra, and  a cornercorner with one Sb(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 26-54°. In the second P site, P(2) is bonded to one O(12), one O(13), one O(16), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one Sb(1)O6 octahedra,  a cornercorner with one Sb(2)O6 octahedra,  a cornercorner with one Sb(3)O6 octahedra, and  a cornercorner with one Sb(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 27-54°. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to one K(1), one K(2), one Sb(1), and one Sb(2) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one K(1), one K(2), one Sb(1), and one Sb(2) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one K(1), one Sb(2), and one Sb(4) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one K(2), one Sb(1), and one Sb(3) atom. In the fifth O site, O(5) is bonded in a 2-coordinate geometry to one K(1), one K(2), one Sb(3), and one Sb(4) atom. In the sixth O site, O(6) is bonded in a 2-coordinate geometry to one K(1), one K(2), one Sb(3), and one Sb(4) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one K(2), one Sb(2), and one Sb(3) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one K(1), one Sb(1), and one Sb(4) atom. In the ninth O site, O(9) is bonded in a 2-coordinate geometry to one K(1), one Sb(1), and one P(2) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one K(2), one Sb(2), and one P(1) atom. In the eleventh O site, O(11) is bonded in a distorted bent 120 degrees geometry to one Sb(4) and one P(1) atom. In the twelfth O site, O(12) is bonded in a distorted bent 120 degrees geometry to one Sb(3) and one P(2) atom. In the thirteenth O site, O(13) is bonded in a distorted bent 150 degrees geometry to one K(2), one Sb(4), and one P(2) atom. In the fourteenth O site, O(14) is bonded in a distorted bent 150 degrees geometry to one K(1), one Sb(3), and one P(1) atom. In the fifteenth O site, O(15) is bonded in a 2-coordinate geometry to one K(2), one Sb(1), and one P(1) atom. In the sixteenth O site, O(16) is bonded in a 2-coordinate geometry to one K(1), one Sb(2), and one P(2) atom. is represented by the CIF file [CIF]
data_KSb2PO8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.222
_cell_length_b   7.222
_cell_length_c   15.261
_cell_angle_alpha   84.820
_cell_angle_beta   84.820
_cell_angle_gamma   59.718
_symmetry_Int_Tables_number   1
_cell_volume   683.712
_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
  K  K0  1  0.091  0.848  0.888  1.0
  K  K1  1  0.848  0.091  0.388  1.0
  K  K2  1  0.908  0.149  0.119  1.0
  K  K3  1  0.149  0.908  0.619  1.0
  Sb  Sb4  1  0.622  0.877  0.748  1.0
  Sb  Sb5  1  0.877  0.622  0.248  1.0
  Sb  Sb6  1  0.379  0.125  0.255  1.0
  Sb  Sb7  1  0.125  0.379  0.755  1.0
  Sb  Sb8  1  0.546  0.810  0.065  1.0
  Sb  Sb9  1  0.810  0.546  0.565  1.0
  Sb  Sb10  1  0.456  0.193  0.938  1.0
  Sb  Sb11  1  0.193  0.456  0.438  1.0
  P  P12  1  0.287  0.513  0.107  1.0
  P  P13  1  0.513  0.287  0.607  1.0
  P  P14  1  0.714  0.489  0.895  1.0
  P  P15  1  0.489  0.714  0.395  1.0
  O  O16  1  0.940  0.696  0.749  1.0
  O  O17  1  0.696  0.940  0.249  1.0
  O  O18  1  0.061  0.305  0.255  1.0
  O  O19  1  0.305  0.061  0.755  1.0
  O  O20  1  0.259  0.414  0.855  1.0
  O  O21  1  0.414  0.259  0.355  1.0
  O  O22  1  0.750  0.587  0.145  1.0
  O  O23  1  0.587  0.750  0.645  1.0
  O  O24  1  0.333  0.003  0.974  1.0
  O  O25  1  0.003  0.333  0.474  1.0
  O  O26  1  0.668  0.002  0.030  1.0
  O  O27  1  0.002  0.668  0.530  1.0
  O  O28  1  0.342  0.980  0.161  1.0
  O  O29  1  0.980  0.342  0.661  1.0
  O  O30  1  0.662  0.017  0.844  1.0
  O  O31  1  0.017  0.662  0.344  1.0
  O  O32  1  0.562  0.660  0.827  1.0
  O  O33  1  0.660  0.562  0.327  1.0
  O  O34  1  0.442  0.337  0.174  1.0
  O  O35  1  0.337  0.442  0.674  1.0
  O  O36  1  0.245  0.408  0.033  1.0
  O  O37  1  0.408  0.245  0.533  1.0
  O  O38  1  0.753  0.597  0.969  1.0
  O  O39  1  0.597  0.753  0.469  1.0
  O  O40  1  0.617  0.356  0.939  1.0
  O  O41  1  0.356  0.617  0.439  1.0
  O  O42  1  0.381  0.651  0.064  1.0
  O  O43  1  0.651  0.381  0.564  1.0
  O  O44  1  0.074  0.674  0.156  1.0
  O  O45  1  0.674  0.074  0.656  1.0
  O  O46  1  0.930  0.328  0.849  1.0
  O  O47  1  0.328  0.930  0.349  1.0
[/CIF]
.