The structure described by Na2Mn2Cd(PO4)3 crystallizes in the monoclinic C2/c space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 8-coordinate geometry to two equivalent O(3), two equivalent O(6), and four equivalent O(5) atoms. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to two equivalent O(1) and four equivalent O(2) atoms. Mn(1) is bonded to one O(1), one O(3), one O(5), one O(6), and two equivalent O(4) atoms to form MnO6 octahedra that share corners with two equivalent P(1)O4 tetrahedra, corners with four equivalent P(2)O4 tetrahedra,  an edgeedge with one Mn(1)O6 octahedra, and  an edgeedge with one Cd(1)O6 octahedra. Cd(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(6) atoms to form distorted CdO6 octahedra that share corners with two equivalent P(1)O4 tetrahedra, corners with four equivalent P(2)O4 tetrahedra, and edges with two equivalent Mn(1)O6 octahedra. There are two inequivalent P sites. In the first P site, P(1) is bonded to two equivalent O(1) and two equivalent O(3) atoms to form PO4 tetrahedra that share corners with two equivalent Cd(1)O6 octahedra and corners with four equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 50-64°. In the second P site, P(2) is bonded to one O(2), one O(4), one O(5), and one O(6) atom to form PO4 tetrahedra that share corners with two equivalent Cd(1)O6 octahedra and corners with four equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 40-58°. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Na(2), one Mn(1), and one P(1) atom. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Na(2), one Cd(1), and one P(2) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Na(1), one Mn(1), one Cd(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to two equivalent Mn(1) and one P(2) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to two equivalent Na(1), one Mn(1), and one P(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Na(1), one Mn(1), one Cd(1), and one P(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na2Mn2Cd(PO4)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.860
_cell_length_b   8.860
_cell_length_c   6.804
_cell_angle_alpha   72.560
_cell_angle_beta   72.560
_cell_angle_gamma   91.944
_symmetry_Int_Tables_number   1
_cell_volume   481.692
_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
  Na  Na0  1  0.981  0.019  0.250  1.0
  Na  Na1  1  0.019  0.981  0.750  1.0
  Na  Na2  1  0.500  0.500  0.000  1.0
  Na  Na3  1  0.500  0.500  0.500  1.0
  Mn  Mn4  1  0.384  0.064  0.363  1.0
  Mn  Mn5  1  0.616  0.936  0.637  1.0
  Mn  Mn6  1  0.936  0.616  0.137  1.0
  Mn  Mn7  1  0.064  0.384  0.863  1.0
  Cd  Cd8  1  0.267  0.733  0.250  1.0
  Cd  Cd9  1  0.733  0.267  0.750  1.0
  P  P10  1  0.718  0.282  0.250  1.0
  P  P11  1  0.282  0.718  0.750  1.0
  P  P12  1  0.656  0.872  0.126  1.0
  P  P13  1  0.344  0.128  0.874  1.0
  P  P14  1  0.128  0.344  0.374  1.0
  P  P15  1  0.872  0.656  0.626  1.0
  O  O16  1  0.544  0.263  0.246  1.0
  O  O17  1  0.456  0.737  0.754  1.0
  O  O18  1  0.737  0.456  0.254  1.0
  O  O19  1  0.263  0.544  0.746  1.0
  O  O20  1  0.537  0.723  0.178  1.0
  O  O21  1  0.463  0.277  0.822  1.0
  O  O22  1  0.277  0.463  0.322  1.0
  O  O23  1  0.723  0.537  0.678  1.0
  O  O24  1  0.744  0.165  0.456  1.0
  O  O25  1  0.256  0.835  0.544  1.0
  O  O26  1  0.835  0.256  0.044  1.0
  O  O27  1  0.165  0.744  0.956  1.0
  O  O28  1  0.598  0.953  0.307  1.0
  O  O29  1  0.402  0.047  0.693  1.0
  O  O30  1  0.047  0.402  0.193  1.0
  O  O31  1  0.953  0.598  0.807  1.0
  O  O32  1  0.827  0.829  0.116  1.0
  O  O33  1  0.173  0.171  0.884  1.0
  O  O34  1  0.171  0.173  0.384  1.0
  O  O35  1  0.829  0.827  0.616  1.0
  O  O36  1  0.328  0.005  0.101  1.0
  O  O37  1  0.672  0.995  0.899  1.0
  O  O38  1  0.995  0.672  0.399  1.0
  O  O39  1  0.005  0.328  0.601  1.0
[/CIF]
.
The structure described by Na2Mn2Cd(PO4)3 crystallizes in the monoclinic C2/c space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 8-coordinate geometry to two equivalent O(3), two equivalent O(6), and four equivalent O(5) atoms. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to two equivalent O(1) and four equivalent O(2) atoms. Mn(1) is bonded to one O(1), one O(3), one O(5), one O(6), and two equivalent O(4) atoms to form MnO6 octahedra that share corners with two equivalent P(1)O4 tetrahedra, corners with four equivalent P(2)O4 tetrahedra,  an edgeedge with one Mn(1)O6 octahedra, and  an edgeedge with one Cd(1)O6 octahedra. Cd(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(6) atoms to form distorted CdO6 octahedra that share corners with two equivalent P(1)O4 tetrahedra, corners with four equivalent P(2)O4 tetrahedra, and edges with two equivalent Mn(1)O6 octahedra. There are two inequivalent P sites. In the first P site, P(1) is bonded to two equivalent O(1) and two equivalent O(3) atoms to form PO4 tetrahedra that share corners with two equivalent Cd(1)O6 octahedra and corners with four equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 50-64°. In the second P site, P(2) is bonded to one O(2), one O(4), one O(5), and one O(6) atom to form PO4 tetrahedra that share corners with two equivalent Cd(1)O6 octahedra and corners with four equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 40-58°. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Na(2), one Mn(1), and one P(1) atom. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Na(2), one Cd(1), and one P(2) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Na(1), one Mn(1), one Cd(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to two equivalent Mn(1) and one P(2) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to two equivalent Na(1), one Mn(1), and one P(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Na(1), one Mn(1), one Cd(1), and one P(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na2Mn2Cd(PO4)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.860
_cell_length_b   8.860
_cell_length_c   6.804
_cell_angle_alpha   72.560
_cell_angle_beta   72.560
_cell_angle_gamma   91.944
_symmetry_Int_Tables_number   1
_cell_volume   481.692
_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
  Na  Na0  1  0.981  0.019  0.250  1.0
  Na  Na1  1  0.019  0.981  0.750  1.0
  Na  Na2  1  0.500  0.500  0.000  1.0
  Na  Na3  1  0.500  0.500  0.500  1.0
  Mn  Mn4  1  0.384  0.064  0.363  1.0
  Mn  Mn5  1  0.616  0.936  0.637  1.0
  Mn  Mn6  1  0.936  0.616  0.137  1.0
  Mn  Mn7  1  0.064  0.384  0.863  1.0
  Cd  Cd8  1  0.267  0.733  0.250  1.0
  Cd  Cd9  1  0.733  0.267  0.750  1.0
  P  P10  1  0.718  0.282  0.250  1.0
  P  P11  1  0.282  0.718  0.750  1.0
  P  P12  1  0.656  0.872  0.126  1.0
  P  P13  1  0.344  0.128  0.874  1.0
  P  P14  1  0.128  0.344  0.374  1.0
  P  P15  1  0.872  0.656  0.626  1.0
  O  O16  1  0.544  0.263  0.246  1.0
  O  O17  1  0.456  0.737  0.754  1.0
  O  O18  1  0.737  0.456  0.254  1.0
  O  O19  1  0.263  0.544  0.746  1.0
  O  O20  1  0.537  0.723  0.178  1.0
  O  O21  1  0.463  0.277  0.822  1.0
  O  O22  1  0.277  0.463  0.322  1.0
  O  O23  1  0.723  0.537  0.678  1.0
  O  O24  1  0.744  0.165  0.456  1.0
  O  O25  1  0.256  0.835  0.544  1.0
  O  O26  1  0.835  0.256  0.044  1.0
  O  O27  1  0.165  0.744  0.956  1.0
  O  O28  1  0.598  0.953  0.307  1.0
  O  O29  1  0.402  0.047  0.693  1.0
  O  O30  1  0.047  0.402  0.193  1.0
  O  O31  1  0.953  0.598  0.807  1.0
  O  O32  1  0.827  0.829  0.116  1.0
  O  O33  1  0.173  0.171  0.884  1.0
  O  O34  1  0.171  0.173  0.384  1.0
  O  O35  1  0.829  0.827  0.616  1.0
  O  O36  1  0.328  0.005  0.101  1.0
  O  O37  1  0.672  0.995  0.899  1.0
  O  O38  1  0.995  0.672  0.399  1.0
  O  O39  1  0.005  0.328  0.601  1.0
[/CIF]
.