The structure described by Na2MgV2Cd2O8 crystallizes in the orthorhombic Amm2 space group. Na(1) is bonded in a 5-coordinate geometry to one O(3), two equivalent O(1), and two equivalent O(4) atoms. Mg(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form distorted MgO4 tetrahedra that share corners with two equivalent V(2)O4 tetrahedra, corners with two equivalent Cd(2)O4 trigonal pyramids, and  an edgeedge with one V(2)O4 tetrahedra. There are two inequivalent V sites. In the first V site, V(1) is bonded to two equivalent O(3) and two equivalent O(4) atoms to form VO4 tetrahedra that share corners with two equivalent Cd(2)O4 trigonal pyramids. In the second V site, V(2) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form VO4 tetrahedra that share corners with two equivalent Mg(1)O4 tetrahedra,  an edgeedge with one Mg(1)O4 tetrahedra, and  an edgeedge with one Cd(2)O4 trigonal pyramid. There are two inequivalent Cd sites. In the first Cd site, Cd(1) is bonded in a 4-coordinate geometry to two equivalent O(2) and two equivalent O(4) atoms. In the second Cd site, Cd(2) is bonded to two equivalent O(1) and two equivalent O(3) atoms to form distorted CdO4 trigonal pyramids that share corners with two equivalent Mg(1)O4 tetrahedra, corners with two equivalent V(1)O4 tetrahedra, and  an edgeedge with one V(2)O4 tetrahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Na(1), one Mg(1), one V(2), and one Cd(2) atom to form distorted ONa2MgVCd trigonal bipyramids that share corners with four equivalent O(4)Na2VCd trigonal pyramids,  an edgeedge with one O(1)Na2MgVCd trigonal bipyramid, and  a faceface with one O(1)Na2MgVCd trigonal bipyramid. In the second O site, O(2) is bonded in a distorted T-shaped geometry to one Mg(1), one V(2), and one Cd(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Na(1), one V(1), and one Cd(2) atom. In the fourth O site, O(4) is bonded to two equivalent Na(1), one V(1), and one Cd(1) atom to form distorted ONa2VCd trigonal pyramids that share corners with four equivalent O(1)Na2MgVCd trigonal bipyramids and edges with two equivalent O(4)Na2VCd trigonal pyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na2MgV2Cd2O8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.083
_cell_length_b   6.083
_cell_length_c   6.881
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   119.850
_symmetry_Int_Tables_number   1
_cell_volume   220.809
_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  0.557  0.443  0.968  1.0
  Na  Na1  1  0.557  0.443  0.532  1.0
  Mg  Mg2  1  0.363  0.637  0.250  1.0
  V  V3  1  0.883  0.117  0.750  1.0
  V  V4  1  0.094  0.906  0.250  1.0
  Cd  Cd5  1  0.194  0.806  0.750  1.0
  Cd  Cd6  1  0.823  0.177  0.250  1.0
  O  O7  1  0.729  0.758  0.250  1.0
  O  O8  1  0.242  0.271  0.250  1.0
  O  O9  1  0.226  0.774  0.448  1.0
  O  O10  1  0.226  0.774  0.052  1.0
  O  O11  1  0.776  0.224  0.552  1.0
  O  O12  1  0.776  0.224  0.948  1.0
  O  O13  1  0.210  0.242  0.750  1.0
  O  O14  1  0.758  0.790  0.750  1.0
[/CIF]
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The structure described by Na2MgV2Cd2O8 crystallizes in the orthorhombic Amm2 space group. Na(1) is bonded in a 5-coordinate geometry to one O(3), two equivalent O(1), and two equivalent O(4) atoms. Mg(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form distorted MgO4 tetrahedra that share corners with two equivalent V(2)O4 tetrahedra, corners with two equivalent Cd(2)O4 trigonal pyramids, and  an edgeedge with one V(2)O4 tetrahedra. There are two inequivalent V sites. In the first V site, V(1) is bonded to two equivalent O(3) and two equivalent O(4) atoms to form VO4 tetrahedra that share corners with two equivalent Cd(2)O4 trigonal pyramids. In the second V site, V(2) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form VO4 tetrahedra that share corners with two equivalent Mg(1)O4 tetrahedra,  an edgeedge with one Mg(1)O4 tetrahedra, and  an edgeedge with one Cd(2)O4 trigonal pyramid. There are two inequivalent Cd sites. In the first Cd site, Cd(1) is bonded in a 4-coordinate geometry to two equivalent O(2) and two equivalent O(4) atoms. In the second Cd site, Cd(2) is bonded to two equivalent O(1) and two equivalent O(3) atoms to form distorted CdO4 trigonal pyramids that share corners with two equivalent Mg(1)O4 tetrahedra, corners with two equivalent V(1)O4 tetrahedra, and  an edgeedge with one V(2)O4 tetrahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Na(1), one Mg(1), one V(2), and one Cd(2) atom to form distorted ONa2MgVCd trigonal bipyramids that share corners with four equivalent O(4)Na2VCd trigonal pyramids,  an edgeedge with one O(1)Na2MgVCd trigonal bipyramid, and  a faceface with one O(1)Na2MgVCd trigonal bipyramid. In the second O site, O(2) is bonded in a distorted T-shaped geometry to one Mg(1), one V(2), and one Cd(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Na(1), one V(1), and one Cd(2) atom. In the fourth O site, O(4) is bonded to two equivalent Na(1), one V(1), and one Cd(1) atom to form distorted ONa2VCd trigonal pyramids that share corners with four equivalent O(1)Na2MgVCd trigonal bipyramids and edges with two equivalent O(4)Na2VCd trigonal pyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na2MgV2Cd2O8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.083
_cell_length_b   6.083
_cell_length_c   6.881
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   119.850
_symmetry_Int_Tables_number   1
_cell_volume   220.809
_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  0.557  0.443  0.968  1.0
  Na  Na1  1  0.557  0.443  0.532  1.0
  Mg  Mg2  1  0.363  0.637  0.250  1.0
  V  V3  1  0.883  0.117  0.750  1.0
  V  V4  1  0.094  0.906  0.250  1.0
  Cd  Cd5  1  0.194  0.806  0.750  1.0
  Cd  Cd6  1  0.823  0.177  0.250  1.0
  O  O7  1  0.729  0.758  0.250  1.0
  O  O8  1  0.242  0.271  0.250  1.0
  O  O9  1  0.226  0.774  0.448  1.0
  O  O10  1  0.226  0.774  0.052  1.0
  O  O11  1  0.776  0.224  0.552  1.0
  O  O12  1  0.776  0.224  0.948  1.0
  O  O13  1  0.210  0.242  0.750  1.0
  O  O14  1  0.758  0.790  0.750  1.0
[/CIF]
.