The crystal structure described by Na2MgV2Cd2O8 crystallizes in the triclinic P1 space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(4), one O(6), and one O(8) atom. In the second Na site, Na(2) is bonded to one O(1), one O(5), one O(7), and one O(8) atom to form distorted NaO4 trigonal pyramids that share  a cornercorner with one V(2)O4 tetrahedra, corners with two equivalent Cd(2)O4 tetrahedra, corners with three equivalent V(1)O4 tetrahedra, and  a cornercorner with one Mg(1)O4 trigonal pyramid. Mg(1) is bonded to one O(2), one O(4), one O(6), and one O(7) atom to form MgO4 trigonal pyramids that share  a cornercorner with one Cd(2)O4 tetrahedra, corners with two equivalent V(2)O4 tetrahedra,  a cornercorner with one Na(2)O4 trigonal pyramid, and  an edgeedge with one V(1)O4 tetrahedra. There are two inequivalent V sites. In the first V site, V(1) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form VO4 tetrahedra that share corners with two equivalent Cd(2)O4 tetrahedra, corners with three equivalent Na(2)O4 trigonal pyramids, and  an edgeedge with one Mg(1)O4 trigonal pyramid. In the second V site, V(2) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form VO4 tetrahedra that share corners with two equivalent Cd(2)O4 tetrahedra,  a cornercorner with one Na(2)O4 trigonal pyramid, and corners with two equivalent Mg(1)O4 trigonal pyramids. There are two inequivalent Cd sites. In the first Cd site, Cd(1) is bonded in a 4-coordinate geometry to one O(3), one O(4), one O(5), and one O(7) atom. In the second Cd site, Cd(2) is bonded to one O(1), one O(3), one O(5), and one O(6) atom to form distorted CdO4 tetrahedra that share corners with two equivalent V(1)O4 tetrahedra, corners with two equivalent V(2)O4 tetrahedra,  a cornercorner with one Mg(1)O4 trigonal pyramid, and corners with two equivalent Na(2)O4 trigonal pyramids. There are eight inequivalent O sites. In the first O site, O(1) is bonded to one Na(1), one Na(2), one V(2), and one Cd(2) atom to form a mixture of corner and edge-sharing ONa2VCd tetrahedra. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Na(1), one Mg(1), and one V(2) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one V(2), one Cd(1), and one Cd(2) atom. In the fourth O site, O(4) is bonded to one Na(1), one Mg(1), one V(2), and one Cd(1) atom to form distorted ONaMgVCd trigonal pyramids that share  an edgeedge with one O(1)Na2VCd tetrahedra and  an edgeedge with one O(6)NaMgVCd tetrahedra. In the fifth O site, O(5) is bonded in a distorted rectangular see-saw-like geometry to one Na(2), one V(1), one Cd(1), and one Cd(2) atom. In the sixth O site, O(6) is bonded to one Na(1), one Mg(1), one V(1), and one Cd(2) atom to form ONaMgVCd tetrahedra that share corners with two equivalent O(1)Na2VCd tetrahedra and  an edgeedge with one O(4)NaMgVCd trigonal pyramid. In the seventh O site, O(7) is bonded in a see-saw-like geometry to one Na(2), one Mg(1), one V(1), and one Cd(1) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Na(1), one Na(2), and one V(1) atom. is represented by the CIF file [CIF]
data_Na2MgV2Cd2O8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.501
_cell_length_b   6.195
_cell_length_c   6.959
_cell_angle_alpha   92.805
_cell_angle_beta   78.527
_cell_angle_gamma   120.532
_symmetry_Int_Tables_number   1
_cell_volume   236.111
_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  0.693  0.496  0.034  1.0
  Na  Na1  1  0.575  0.478  0.552  1.0
  Mg  Mg2  1  0.174  0.426  0.977  1.0
  V  V3  1  0.808  0.069  0.774  1.0
  V  V4  1  0.139  0.931  0.203  1.0
  Cd  Cd5  1  0.219  0.932  0.709  1.0
  Cd  Cd6  1  0.664  0.008  0.313  1.0
  O  O7  1  0.812  0.758  0.289  1.0
  O  O8  1  0.278  0.260  0.138  1.0
  O  O9  1  0.276  0.885  0.394  1.0
  O  O10  1  0.188  0.757  0.987  1.0
  O  O11  1  0.667  0.162  0.620  1.0
  O  O12  1  0.808  0.206  0.024  1.0
  O  O13  1  0.157  0.261  0.719  1.0
  O  O14  1  0.721  0.751  0.794  1.0
[/CIF]
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The crystal structure described by Na2MgV2Cd2O8 crystallizes in the triclinic P1 space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(4), one O(6), and one O(8) atom. In the second Na site, Na(2) is bonded to one O(1), one O(5), one O(7), and one O(8) atom to form distorted NaO4 trigonal pyramids that share  a cornercorner with one V(2)O4 tetrahedra, corners with two equivalent Cd(2)O4 tetrahedra, corners with three equivalent V(1)O4 tetrahedra, and  a cornercorner with one Mg(1)O4 trigonal pyramid. Mg(1) is bonded to one O(2), one O(4), one O(6), and one O(7) atom to form MgO4 trigonal pyramids that share  a cornercorner with one Cd(2)O4 tetrahedra, corners with two equivalent V(2)O4 tetrahedra,  a cornercorner with one Na(2)O4 trigonal pyramid, and  an edgeedge with one V(1)O4 tetrahedra. There are two inequivalent V sites. In the first V site, V(1) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form VO4 tetrahedra that share corners with two equivalent Cd(2)O4 tetrahedra, corners with three equivalent Na(2)O4 trigonal pyramids, and  an edgeedge with one Mg(1)O4 trigonal pyramid. In the second V site, V(2) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form VO4 tetrahedra that share corners with two equivalent Cd(2)O4 tetrahedra,  a cornercorner with one Na(2)O4 trigonal pyramid, and corners with two equivalent Mg(1)O4 trigonal pyramids. There are two inequivalent Cd sites. In the first Cd site, Cd(1) is bonded in a 4-coordinate geometry to one O(3), one O(4), one O(5), and one O(7) atom. In the second Cd site, Cd(2) is bonded to one O(1), one O(3), one O(5), and one O(6) atom to form distorted CdO4 tetrahedra that share corners with two equivalent V(1)O4 tetrahedra, corners with two equivalent V(2)O4 tetrahedra,  a cornercorner with one Mg(1)O4 trigonal pyramid, and corners with two equivalent Na(2)O4 trigonal pyramids. There are eight inequivalent O sites. In the first O site, O(1) is bonded to one Na(1), one Na(2), one V(2), and one Cd(2) atom to form a mixture of corner and edge-sharing ONa2VCd tetrahedra. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Na(1), one Mg(1), and one V(2) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one V(2), one Cd(1), and one Cd(2) atom. In the fourth O site, O(4) is bonded to one Na(1), one Mg(1), one V(2), and one Cd(1) atom to form distorted ONaMgVCd trigonal pyramids that share  an edgeedge with one O(1)Na2VCd tetrahedra and  an edgeedge with one O(6)NaMgVCd tetrahedra. In the fifth O site, O(5) is bonded in a distorted rectangular see-saw-like geometry to one Na(2), one V(1), one Cd(1), and one Cd(2) atom. In the sixth O site, O(6) is bonded to one Na(1), one Mg(1), one V(1), and one Cd(2) atom to form ONaMgVCd tetrahedra that share corners with two equivalent O(1)Na2VCd tetrahedra and  an edgeedge with one O(4)NaMgVCd trigonal pyramid. In the seventh O site, O(7) is bonded in a see-saw-like geometry to one Na(2), one Mg(1), one V(1), and one Cd(1) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Na(1), one Na(2), and one V(1) atom. is represented by the CIF file [CIF]
data_Na2MgV2Cd2O8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.501
_cell_length_b   6.195
_cell_length_c   6.959
_cell_angle_alpha   92.805
_cell_angle_beta   78.527
_cell_angle_gamma   120.532
_symmetry_Int_Tables_number   1
_cell_volume   236.111
_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  0.693  0.496  0.034  1.0
  Na  Na1  1  0.575  0.478  0.552  1.0
  Mg  Mg2  1  0.174  0.426  0.977  1.0
  V  V3  1  0.808  0.069  0.774  1.0
  V  V4  1  0.139  0.931  0.203  1.0
  Cd  Cd5  1  0.219  0.932  0.709  1.0
  Cd  Cd6  1  0.664  0.008  0.313  1.0
  O  O7  1  0.812  0.758  0.289  1.0
  O  O8  1  0.278  0.260  0.138  1.0
  O  O9  1  0.276  0.885  0.394  1.0
  O  O10  1  0.188  0.757  0.987  1.0
  O  O11  1  0.667  0.162  0.620  1.0
  O  O12  1  0.808  0.206  0.024  1.0
  O  O13  1  0.157  0.261  0.719  1.0
  O  O14  1  0.721  0.751  0.794  1.0
[/CIF]
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