The material described by Na2MgV2Cd2O8 crystallizes in the monoclinic C2/m space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to two equivalent O(3) and four equivalent O(1) atoms to form NaO6 octahedra that share corners with two equivalent Mg(1)O6 octahedra, edges with two equivalent Na(2)O6 octahedra, and edges with two equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles are 5°. In the second Na site, Na(2) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form NaO6 octahedra that share corners with four equivalent Mg(1)O6 octahedra and edges with two equivalent Na(1)O6 octahedra. The corner-sharing octahedral tilt angles are 13°. Mg(1) is bonded to two equivalent O(3) and four equivalent O(1) atoms to form distorted MgO6 octahedra that share corners with two equivalent Na(1)O6 octahedra, corners with four equivalent Na(2)O6 octahedra, and edges with two equivalent Na(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 5-13°. V(1) is bonded in a distorted rectangular see-saw-like geometry to one O(2), one O(3), and two equivalent O(1) atoms. Cd(1) is bonded in a 4-coordinate geometry to one O(2), one O(3), and two equivalent O(1) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded to one Na(1), one Na(2), one Mg(1), one V(1), and one Cd(1) atom to form a mixture of distorted face, corner, and edge-sharing ONa2MgVCd trigonal bipyramids. In the second O site, O(2) is bonded in a trigonal planar geometry to one Na(2), one V(1), and one Cd(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Na(1), one Mg(1), one V(1), and one Cd(1) atom. is represented by the CIF card [CIF]
data_Na2MgV2Cd2O8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.807
_cell_length_b   5.807
_cell_length_c   7.309
_cell_angle_alpha   90.219
_cell_angle_beta   89.781
_cell_angle_gamma   114.864
_symmetry_Int_Tables_number   1
_cell_volume   223.612
_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
  Na  Na0  1  0.500  0.500  0.000  1.0
  Na  Na1  1  0.500  0.500  0.500  1.0
  Mg  Mg2  1  0.000  0.000  0.000  1.0
  V  V3  1  0.834  0.166  0.753  1.0
  V  V4  1  0.166  0.834  0.247  1.0
  Cd  Cd5  1  0.167  0.833  0.700  1.0
  Cd  Cd6  1  0.833  0.167  0.300  1.0
  O  O7  1  0.819  0.766  0.229  1.0
  O  O8  1  0.234  0.181  0.229  1.0
  O  O9  1  0.272  0.728  0.446  1.0
  O  O10  1  0.221  0.779  0.014  1.0
  O  O11  1  0.728  0.272  0.554  1.0
  O  O12  1  0.779  0.221  0.986  1.0
  O  O13  1  0.181  0.234  0.771  1.0
  O  O14  1  0.766  0.819  0.771  1.0
[/CIF]
.
The material described by Na2MgV2Cd2O8 crystallizes in the monoclinic C2/m space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to two equivalent O(3) and four equivalent O(1) atoms to form NaO6 octahedra that share corners with two equivalent Mg(1)O6 octahedra, edges with two equivalent Na(2)O6 octahedra, and edges with two equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles are 5°. In the second Na site, Na(2) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form NaO6 octahedra that share corners with four equivalent Mg(1)O6 octahedra and edges with two equivalent Na(1)O6 octahedra. The corner-sharing octahedral tilt angles are 13°. Mg(1) is bonded to two equivalent O(3) and four equivalent O(1) atoms to form distorted MgO6 octahedra that share corners with two equivalent Na(1)O6 octahedra, corners with four equivalent Na(2)O6 octahedra, and edges with two equivalent Na(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 5-13°. V(1) is bonded in a distorted rectangular see-saw-like geometry to one O(2), one O(3), and two equivalent O(1) atoms. Cd(1) is bonded in a 4-coordinate geometry to one O(2), one O(3), and two equivalent O(1) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded to one Na(1), one Na(2), one Mg(1), one V(1), and one Cd(1) atom to form a mixture of distorted face, corner, and edge-sharing ONa2MgVCd trigonal bipyramids. In the second O site, O(2) is bonded in a trigonal planar geometry to one Na(2), one V(1), and one Cd(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Na(1), one Mg(1), one V(1), and one Cd(1) atom. is represented by the CIF card [CIF]
data_Na2MgV2Cd2O8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.807
_cell_length_b   5.807
_cell_length_c   7.309
_cell_angle_alpha   90.219
_cell_angle_beta   89.781
_cell_angle_gamma   114.864
_symmetry_Int_Tables_number   1
_cell_volume   223.612
_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
  Na  Na0  1  0.500  0.500  0.000  1.0
  Na  Na1  1  0.500  0.500  0.500  1.0
  Mg  Mg2  1  0.000  0.000  0.000  1.0
  V  V3  1  0.834  0.166  0.753  1.0
  V  V4  1  0.166  0.834  0.247  1.0
  Cd  Cd5  1  0.167  0.833  0.700  1.0
  Cd  Cd6  1  0.833  0.167  0.300  1.0
  O  O7  1  0.819  0.766  0.229  1.0
  O  O8  1  0.234  0.181  0.229  1.0
  O  O9  1  0.272  0.728  0.446  1.0
  O  O10  1  0.221  0.779  0.014  1.0
  O  O11  1  0.728  0.272  0.554  1.0
  O  O12  1  0.779  0.221  0.986  1.0
  O  O13  1  0.181  0.234  0.771  1.0
  O  O14  1  0.766  0.819  0.771  1.0
[/CIF]
.