The crystal structure described by KPr(WO4)2 crystallizes in the monoclinic C2/m space group. K(1) is bonded in a 8-coordinate geometry to one O(4), one O(5), two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. Pr(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(5) atoms. There are two inequivalent W sites. In the first W site, W(1) is bonded to one O(4), one O(5), two equivalent O(1), and two equivalent O(3) atoms to form distorted edge-sharing WO6 octahedra. In the second W site, W(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form distorted edge-sharing WO6 octahedra. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one K(1), one Pr(1), one W(1), and one W(2) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one K(1), one Pr(1), and one W(2) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one K(1), one Pr(1), and one W(1) atom. In the fourth O site, O(4) is bonded to one K(1), one W(1), and two equivalent W(2) atoms to form OKW3 tetrahedra that share corners with two equivalent O(5)KPr2W tetrahedra and  an edgeedge with one O(4)KW3 tetrahedra. In the fifth O site, O(5) is bonded to one K(1), two equivalent Pr(1), and one W(1) atom to form distorted OKPr2W tetrahedra that share corners with two equivalent O(4)KW3 tetrahedra and  an edgeedge with one O(5)KPr2W tetrahedra. is represented by the CIF card [CIF]
data_KPr(WO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.573
_cell_length_b   7.573
_cell_length_c   7.628
_cell_angle_alpha   66.250
_cell_angle_beta   66.250
_cell_angle_gamma   93.144
_symmetry_Int_Tables_number   1
_cell_volume   354.024
_cell_formula_units_Z   2
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  0.690  0.690  0.472  1.0
  K  K1  1  0.310  0.310  0.528  1.0
  Pr  Pr2  1  0.700  0.300  0.000  1.0
  Pr  Pr3  1  0.300  0.700  0.000  1.0
  W  W4  1  0.205  0.205  0.056  1.0
  W  W5  1  0.795  0.795  0.944  1.0
  W  W6  1  0.839  0.161  0.500  1.0
  W  W7  1  0.161  0.839  0.500  1.0
  O  O8  1  0.345  0.095  0.260  1.0
  O  O9  1  0.655  0.905  0.740  1.0
  O  O10  1  0.905  0.655  0.740  1.0
  O  O11  1  0.095  0.345  0.260  1.0
  O  O12  1  0.693  0.215  0.355  1.0
  O  O13  1  0.307  0.785  0.645  1.0
  O  O14  1  0.785  0.307  0.645  1.0
  O  O15  1  0.215  0.693  0.355  1.0
  O  O16  1  0.706  0.959  0.064  1.0
  O  O17  1  0.294  0.041  0.936  1.0
  O  O18  1  0.041  0.294  0.936  1.0
  O  O19  1  0.959  0.706  0.064  1.0
  O  O20  1  0.984  0.984  0.344  1.0
  O  O21  1  0.016  0.016  0.656  1.0
  O  O22  1  0.573  0.573  0.110  1.0
  O  O23  1  0.427  0.427  0.890  1.0
[/CIF]
.
The crystal structure described by KPr(WO4)2 crystallizes in the monoclinic C2/m space group. K(1) is bonded in a 8-coordinate geometry to one O(4), one O(5), two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. Pr(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(5) atoms. There are two inequivalent W sites. In the first W site, W(1) is bonded to one O(4), one O(5), two equivalent O(1), and two equivalent O(3) atoms to form distorted edge-sharing WO6 octahedra. In the second W site, W(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form distorted edge-sharing WO6 octahedra. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one K(1), one Pr(1), one W(1), and one W(2) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one K(1), one Pr(1), and one W(2) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one K(1), one Pr(1), and one W(1) atom. In the fourth O site, O(4) is bonded to one K(1), one W(1), and two equivalent W(2) atoms to form OKW3 tetrahedra that share corners with two equivalent O(5)KPr2W tetrahedra and  an edgeedge with one O(4)KW3 tetrahedra. In the fifth O site, O(5) is bonded to one K(1), two equivalent Pr(1), and one W(1) atom to form distorted OKPr2W tetrahedra that share corners with two equivalent O(4)KW3 tetrahedra and  an edgeedge with one O(5)KPr2W tetrahedra. is represented by the CIF card [CIF]
data_KPr(WO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.573
_cell_length_b   7.573
_cell_length_c   7.628
_cell_angle_alpha   66.250
_cell_angle_beta   66.250
_cell_angle_gamma   93.144
_symmetry_Int_Tables_number   1
_cell_volume   354.024
_cell_formula_units_Z   2
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  0.690  0.690  0.472  1.0
  K  K1  1  0.310  0.310  0.528  1.0
  Pr  Pr2  1  0.700  0.300  0.000  1.0
  Pr  Pr3  1  0.300  0.700  0.000  1.0
  W  W4  1  0.205  0.205  0.056  1.0
  W  W5  1  0.795  0.795  0.944  1.0
  W  W6  1  0.839  0.161  0.500  1.0
  W  W7  1  0.161  0.839  0.500  1.0
  O  O8  1  0.345  0.095  0.260  1.0
  O  O9  1  0.655  0.905  0.740  1.0
  O  O10  1  0.905  0.655  0.740  1.0
  O  O11  1  0.095  0.345  0.260  1.0
  O  O12  1  0.693  0.215  0.355  1.0
  O  O13  1  0.307  0.785  0.645  1.0
  O  O14  1  0.785  0.307  0.645  1.0
  O  O15  1  0.215  0.693  0.355  1.0
  O  O16  1  0.706  0.959  0.064  1.0
  O  O17  1  0.294  0.041  0.936  1.0
  O  O18  1  0.041  0.294  0.936  1.0
  O  O19  1  0.959  0.706  0.064  1.0
  O  O20  1  0.984  0.984  0.344  1.0
  O  O21  1  0.016  0.016  0.656  1.0
  O  O22  1  0.573  0.573  0.110  1.0
  O  O23  1  0.427  0.427  0.890  1.0
[/CIF]
.