The material structure described by K2CdP2O7 crystallizes in the monoclinic C2/c space group. K(1) is bonded in a 9-coordinate geometry to one O(1), two equivalent O(4), three equivalent O(2), and three equivalent O(3) atoms. Cd(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form CdO6 octahedra that share corners with six equivalent P(1)O4 tetrahedra. P(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form PO4 tetrahedra that share corners with three equivalent Cd(1)O6 octahedra and  a cornercorner with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 22-48°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to two equivalent K(1) and two equivalent P(1) atoms. In the second O site, O(2) is bonded in a 1-coordinate geometry to three equivalent K(1), one Cd(1), and one P(1) atom. In the third O site, O(3) is bonded in a 1-coordinate geometry to three equivalent K(1), one Cd(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a 1-coordinate geometry to two equivalent K(1), one Cd(1), and one P(1) atom. is represented by the CIF card [CIF]
data_K2CdP2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.701
_cell_length_b   5.701
_cell_length_c   13.002
_cell_angle_alpha   75.606
_cell_angle_beta   75.606
_cell_angle_gamma   59.338
_symmetry_Int_Tables_number   1
_cell_volume   348.276
_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  0.940  0.358  0.832  1.0
  K  K1  1  0.060  0.642  0.168  1.0
  K  K2  1  0.642  0.060  0.668  1.0
  K  K3  1  0.358  0.940  0.332  1.0
  Cd  Cd4  1  0.500  0.000  0.000  1.0
  Cd  Cd5  1  0.000  0.500  0.500  1.0
  P  P6  1  0.689  0.255  0.370  1.0
  P  P7  1  0.255  0.689  0.870  1.0
  P  P8  1  0.745  0.311  0.130  1.0
  P  P9  1  0.311  0.745  0.630  1.0
  O  O10  1  0.157  0.843  0.750  1.0
  O  O11  1  0.556  0.200  0.121  1.0
  O  O12  1  0.843  0.157  0.250  1.0
  O  O13  1  0.444  0.800  0.879  1.0
  O  O14  1  0.588  0.622  0.135  1.0
  O  O15  1  0.016  0.209  0.055  1.0
  O  O16  1  0.800  0.444  0.379  1.0
  O  O17  1  0.209  0.016  0.555  1.0
  O  O18  1  0.200  0.556  0.621  1.0
  O  O19  1  0.378  0.412  0.365  1.0
  O  O20  1  0.791  0.984  0.445  1.0
  O  O21  1  0.412  0.378  0.865  1.0
  O  O22  1  0.984  0.791  0.945  1.0
  O  O23  1  0.622  0.588  0.635  1.0
[/CIF]
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The material structure described by K2CdP2O7 crystallizes in the monoclinic C2/c space group. K(1) is bonded in a 9-coordinate geometry to one O(1), two equivalent O(4), three equivalent O(2), and three equivalent O(3) atoms. Cd(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form CdO6 octahedra that share corners with six equivalent P(1)O4 tetrahedra. P(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form PO4 tetrahedra that share corners with three equivalent Cd(1)O6 octahedra and  a cornercorner with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 22-48°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to two equivalent K(1) and two equivalent P(1) atoms. In the second O site, O(2) is bonded in a 1-coordinate geometry to three equivalent K(1), one Cd(1), and one P(1) atom. In the third O site, O(3) is bonded in a 1-coordinate geometry to three equivalent K(1), one Cd(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a 1-coordinate geometry to two equivalent K(1), one Cd(1), and one P(1) atom. is represented by the CIF card [CIF]
data_K2CdP2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.701
_cell_length_b   5.701
_cell_length_c   13.002
_cell_angle_alpha   75.606
_cell_angle_beta   75.606
_cell_angle_gamma   59.338
_symmetry_Int_Tables_number   1
_cell_volume   348.276
_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  0.940  0.358  0.832  1.0
  K  K1  1  0.060  0.642  0.168  1.0
  K  K2  1  0.642  0.060  0.668  1.0
  K  K3  1  0.358  0.940  0.332  1.0
  Cd  Cd4  1  0.500  0.000  0.000  1.0
  Cd  Cd5  1  0.000  0.500  0.500  1.0
  P  P6  1  0.689  0.255  0.370  1.0
  P  P7  1  0.255  0.689  0.870  1.0
  P  P8  1  0.745  0.311  0.130  1.0
  P  P9  1  0.311  0.745  0.630  1.0
  O  O10  1  0.157  0.843  0.750  1.0
  O  O11  1  0.556  0.200  0.121  1.0
  O  O12  1  0.843  0.157  0.250  1.0
  O  O13  1  0.444  0.800  0.879  1.0
  O  O14  1  0.588  0.622  0.135  1.0
  O  O15  1  0.016  0.209  0.055  1.0
  O  O16  1  0.800  0.444  0.379  1.0
  O  O17  1  0.209  0.016  0.555  1.0
  O  O18  1  0.200  0.556  0.621  1.0
  O  O19  1  0.378  0.412  0.365  1.0
  O  O20  1  0.791  0.984  0.445  1.0
  O  O21  1  0.412  0.378  0.865  1.0
  O  O22  1  0.984  0.791  0.945  1.0
  O  O23  1  0.622  0.588  0.635  1.0
[/CIF]
.