The material structure described by Na6MgV2O8 crystallizes in the triclinic P1 space group. There are six inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(1), one O(2), one O(4), and one O(7) atom to form NaO4 tetrahedra that share corners with two equivalent Na(2)O4 tetrahedra, corners with two equivalent Na(6)O4 tetrahedra, corners with two equivalent V(1)O4 tetrahedra, and corners with two equivalent V(2)O4 tetrahedra. In the second Na site, Na(2) is bonded to one O(1), one O(3), one O(4), and one O(5) atom to form distorted NaO4 tetrahedra that share corners with two equivalent Na(1)O4 tetrahedra, corners with two equivalent Na(6)O4 tetrahedra, corners with two equivalent V(1)O4 tetrahedra, corners with two equivalent V(2)O4 tetrahedra, and  an edgeedge with one Mg(1)O4 tetrahedra. In the third Na site, Na(3) is bonded in a 4-coordinate geometry to one O(2), one O(3), one O(4), and one O(6) atom. In the fourth Na site, Na(4) is bonded in a 5-coordinate geometry to one O(3), one O(4), one O(6), one O(7), and one O(8) atom. In the fifth Na site, Na(5) is bonded in a 4-coordinate geometry to one O(2), one O(6), one O(7), and one O(8) atom. In the sixth Na site, Na(6) is bonded to one O(1), one O(5), one O(7), and one O(8) atom to form distorted NaO4 tetrahedra that share corners with two equivalent Na(1)O4 tetrahedra, corners with two equivalent Na(2)O4 tetrahedra, corners with two equivalent V(1)O4 tetrahedra, corners with two equivalent V(2)O4 tetrahedra, and  an edgeedge with one Mg(1)O4 tetrahedra. Mg(1) is bonded to one O(3), one O(5), one O(6), and one O(8) atom to form MgO4 tetrahedra that share corners with two equivalent V(1)O4 tetrahedra, corners with two equivalent V(2)O4 tetrahedra,  an edgeedge with one Na(2)O4 tetrahedra, and  an edgeedge with one Na(6)O4 tetrahedra. There are two inequivalent V sites. In the first V site, V(1) is bonded to one O(1), one O(2), one O(3), and one O(8) atom to form VO4 tetrahedra that share corners with two equivalent Na(1)O4 tetrahedra, corners with two equivalent Na(2)O4 tetrahedra, corners with two equivalent Na(6)O4 tetrahedra, and corners with two equivalent Mg(1)O4 tetrahedra. In the second V site, V(2) is bonded to one O(4), one O(5), one O(6), and one O(7) atom to form VO4 tetrahedra that share corners with two equivalent Na(1)O4 tetrahedra, corners with two equivalent Na(2)O4 tetrahedra, corners with two equivalent Na(6)O4 tetrahedra, and corners with two equivalent Mg(1)O4 tetrahedra. There are eight inequivalent O sites. In the first O site, O(1) is bonded to one Na(1), one Na(2), one Na(6), and one V(1) atom to form ONa3V tetrahedra that share corners with two equivalent O(2)Na3V tetrahedra and corners with two equivalent O(5)Na2MgV trigonal pyramids. In the second O site, O(2) is bonded to one Na(1), one Na(3), one Na(5), and one V(1) atom to form ONa3V tetrahedra that share corners with two equivalent O(6)Na3MgV square pyramids and corners with two equivalent O(1)Na3V tetrahedra. In the third O site, O(3) is bonded in a 5-coordinate geometry to one Na(2), one Na(3), one Na(4), one Mg(1), and one V(1) atom. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to one Na(1), one Na(2), one Na(3), one Na(4), and one V(2) atom. In the fifth O site, O(5) is bonded to one Na(2), one Na(6), one Mg(1), and one V(2) atom to form distorted ONa2MgV trigonal pyramids that share corners with two equivalent O(6)Na3MgV square pyramids and corners with two equivalent O(1)Na3V tetrahedra. In the sixth O site, O(6) is bonded to one Na(3), one Na(4), one Na(5), one Mg(1), and one V(2) atom to form distorted ONa3MgV square pyramids that share corners with two equivalent O(2)Na3V tetrahedra and corners with two equivalent O(5)Na2MgV trigonal pyramids. In the seventh O site, O(7) is bonded in a 5-coordinate geometry to one Na(1), one Na(4), one Na(5), one Na(6), and one V(2) atom. In the eighth O site, O(8) is bonded in a 5-coordinate geometry to one Na(4), one Na(5), one Na(6), one Mg(1), and one V(1) atom. is represented by the CIF card [CIF]
data_Na6MgV2O8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.796
_cell_length_b   6.124
_cell_length_c   6.190
_cell_angle_alpha   85.928
_cell_angle_beta   89.942
_cell_angle_gamma   90.048
_symmetry_Int_Tables_number   1
_cell_volume   256.931
_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  1.000  0.092  0.492  1.0
  Na  Na1  1  0.228  0.328  0.979  1.0
  Na  Na2  1  0.264  0.610  0.382  1.0
  Na  Na3  1  0.499  0.961  0.124  1.0
  Na  Na4  1  0.734  0.610  0.378  1.0
  Na  Na5  1  0.772  0.328  0.977  1.0
  Mg  Mg6  1  0.500  0.670  0.791  1.0
  V  V7  1  0.000  0.829  0.011  1.0
  V  V8  1  0.500  0.165  0.509  1.0
  O  O9  1  0.001  0.093  0.871  1.0
  O  O10  1  0.000  0.797  0.299  1.0
  O  O11  1  0.256  0.711  0.963  1.0
  O  O12  1  0.290  0.242  0.345  1.0
  O  O13  1  0.500  0.349  0.739  1.0
  O  O14  1  0.500  0.855  0.517  1.0
  O  O15  1  0.710  0.241  0.344  1.0
  O  O16  1  0.744  0.711  0.963  1.0
[/CIF]
.
The material structure described by Na6MgV2O8 crystallizes in the triclinic P1 space group. There are six inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(1), one O(2), one O(4), and one O(7) atom to form NaO4 tetrahedra that share corners with two equivalent Na(2)O4 tetrahedra, corners with two equivalent Na(6)O4 tetrahedra, corners with two equivalent V(1)O4 tetrahedra, and corners with two equivalent V(2)O4 tetrahedra. In the second Na site, Na(2) is bonded to one O(1), one O(3), one O(4), and one O(5) atom to form distorted NaO4 tetrahedra that share corners with two equivalent Na(1)O4 tetrahedra, corners with two equivalent Na(6)O4 tetrahedra, corners with two equivalent V(1)O4 tetrahedra, corners with two equivalent V(2)O4 tetrahedra, and  an edgeedge with one Mg(1)O4 tetrahedra. In the third Na site, Na(3) is bonded in a 4-coordinate geometry to one O(2), one O(3), one O(4), and one O(6) atom. In the fourth Na site, Na(4) is bonded in a 5-coordinate geometry to one O(3), one O(4), one O(6), one O(7), and one O(8) atom. In the fifth Na site, Na(5) is bonded in a 4-coordinate geometry to one O(2), one O(6), one O(7), and one O(8) atom. In the sixth Na site, Na(6) is bonded to one O(1), one O(5), one O(7), and one O(8) atom to form distorted NaO4 tetrahedra that share corners with two equivalent Na(1)O4 tetrahedra, corners with two equivalent Na(2)O4 tetrahedra, corners with two equivalent V(1)O4 tetrahedra, corners with two equivalent V(2)O4 tetrahedra, and  an edgeedge with one Mg(1)O4 tetrahedra. Mg(1) is bonded to one O(3), one O(5), one O(6), and one O(8) atom to form MgO4 tetrahedra that share corners with two equivalent V(1)O4 tetrahedra, corners with two equivalent V(2)O4 tetrahedra,  an edgeedge with one Na(2)O4 tetrahedra, and  an edgeedge with one Na(6)O4 tetrahedra. There are two inequivalent V sites. In the first V site, V(1) is bonded to one O(1), one O(2), one O(3), and one O(8) atom to form VO4 tetrahedra that share corners with two equivalent Na(1)O4 tetrahedra, corners with two equivalent Na(2)O4 tetrahedra, corners with two equivalent Na(6)O4 tetrahedra, and corners with two equivalent Mg(1)O4 tetrahedra. In the second V site, V(2) is bonded to one O(4), one O(5), one O(6), and one O(7) atom to form VO4 tetrahedra that share corners with two equivalent Na(1)O4 tetrahedra, corners with two equivalent Na(2)O4 tetrahedra, corners with two equivalent Na(6)O4 tetrahedra, and corners with two equivalent Mg(1)O4 tetrahedra. There are eight inequivalent O sites. In the first O site, O(1) is bonded to one Na(1), one Na(2), one Na(6), and one V(1) atom to form ONa3V tetrahedra that share corners with two equivalent O(2)Na3V tetrahedra and corners with two equivalent O(5)Na2MgV trigonal pyramids. In the second O site, O(2) is bonded to one Na(1), one Na(3), one Na(5), and one V(1) atom to form ONa3V tetrahedra that share corners with two equivalent O(6)Na3MgV square pyramids and corners with two equivalent O(1)Na3V tetrahedra. In the third O site, O(3) is bonded in a 5-coordinate geometry to one Na(2), one Na(3), one Na(4), one Mg(1), and one V(1) atom. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to one Na(1), one Na(2), one Na(3), one Na(4), and one V(2) atom. In the fifth O site, O(5) is bonded to one Na(2), one Na(6), one Mg(1), and one V(2) atom to form distorted ONa2MgV trigonal pyramids that share corners with two equivalent O(6)Na3MgV square pyramids and corners with two equivalent O(1)Na3V tetrahedra. In the sixth O site, O(6) is bonded to one Na(3), one Na(4), one Na(5), one Mg(1), and one V(2) atom to form distorted ONa3MgV square pyramids that share corners with two equivalent O(2)Na3V tetrahedra and corners with two equivalent O(5)Na2MgV trigonal pyramids. In the seventh O site, O(7) is bonded in a 5-coordinate geometry to one Na(1), one Na(4), one Na(5), one Na(6), and one V(2) atom. In the eighth O site, O(8) is bonded in a 5-coordinate geometry to one Na(4), one Na(5), one Na(6), one Mg(1), and one V(1) atom. is represented by the CIF card [CIF]
data_Na6MgV2O8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.796
_cell_length_b   6.124
_cell_length_c   6.190
_cell_angle_alpha   85.928
_cell_angle_beta   89.942
_cell_angle_gamma   90.048
_symmetry_Int_Tables_number   1
_cell_volume   256.931
_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  1.000  0.092  0.492  1.0
  Na  Na1  1  0.228  0.328  0.979  1.0
  Na  Na2  1  0.264  0.610  0.382  1.0
  Na  Na3  1  0.499  0.961  0.124  1.0
  Na  Na4  1  0.734  0.610  0.378  1.0
  Na  Na5  1  0.772  0.328  0.977  1.0
  Mg  Mg6  1  0.500  0.670  0.791  1.0
  V  V7  1  0.000  0.829  0.011  1.0
  V  V8  1  0.500  0.165  0.509  1.0
  O  O9  1  0.001  0.093  0.871  1.0
  O  O10  1  0.000  0.797  0.299  1.0
  O  O11  1  0.256  0.711  0.963  1.0
  O  O12  1  0.290  0.242  0.345  1.0
  O  O13  1  0.500  0.349  0.739  1.0
  O  O14  1  0.500  0.855  0.517  1.0
  O  O15  1  0.710  0.241  0.344  1.0
  O  O16  1  0.744  0.711  0.963  1.0
[/CIF]
.