The structure described by Na2MgV4O10 crystallizes in the orthorhombic Amm2 space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate geometry to two equivalent O(3), two equivalent O(4), and two equivalent O(6) atoms. In the second Na site, Na(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(5) atoms to form distorted NaO6 octahedra that share corners with two equivalent Na(2)O6 octahedra and corners with two equivalent V(2)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 74°. Mg(1) is bonded in a 8-coordinate geometry to two equivalent O(3), two equivalent O(4), and four equivalent O(6) atoms. There are two inequivalent V sites. In the first V site, V(1) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(3), and two equivalent O(5) atoms. In the second V site, V(2) is bonded to one O(4), one O(5), one O(6), and two equivalent O(3) atoms to form distorted VO5 trigonal bipyramids that share  a cornercorner with one Na(2)O6 octahedra and corners with three equivalent V(2)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 55°. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Na(2) and one V(1) atom. In the second O site, O(2) is bonded to two equivalent Na(2) and two equivalent V(1) atoms to form corner-sharing ONa2V2 tetrahedra. In the third O site, O(3) is bonded in a 5-coordinate geometry to one Na(1), one Mg(1), one V(1), and two equivalent V(2) atoms. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to two equivalent Na(1), two equivalent Mg(1), and two equivalent V(2) atoms. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Na(2), one V(2), and two equivalent V(1) atoms. In the sixth O site, O(6) is bonded in a distorted rectangular see-saw-like geometry to one Na(1), two equivalent Mg(1), and one V(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na2MgV4O10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.816
_cell_length_b   6.035
_cell_length_c   11.433
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   108.431
_symmetry_Int_Tables_number   1
_cell_volume   249.791
_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  0.110  0.221  0.750  1.0
  Na  Na1  1  0.912  0.824  0.250  1.0
  Mg  Mg2  1  0.363  0.727  0.750  1.0
  V  V3  1  0.211  0.422  0.399  1.0
  V  V4  1  0.211  0.422  0.101  1.0
  V  V5  1  0.801  0.601  0.586  1.0
  V  V6  1  0.801  0.601  0.914  1.0
  O  O7  1  0.068  0.135  0.112  1.0
  O  O8  1  0.068  0.135  0.388  1.0
  O  O9  1  0.286  0.572  0.250  1.0
  O  O10  1  0.263  0.526  0.581  1.0
  O  O11  1  0.263  0.526  0.919  1.0
  O  O12  1  0.737  0.474  0.750  1.0
  O  O13  1  0.761  0.523  0.074  1.0
  O  O14  1  0.761  0.523  0.426  1.0
  O  O15  1  0.942  0.884  0.636  1.0
  O  O16  1  0.942  0.884  0.864  1.0
[/CIF]
.
The structure described by Na2MgV4O10 crystallizes in the orthorhombic Amm2 space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate geometry to two equivalent O(3), two equivalent O(4), and two equivalent O(6) atoms. In the second Na site, Na(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(5) atoms to form distorted NaO6 octahedra that share corners with two equivalent Na(2)O6 octahedra and corners with two equivalent V(2)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 74°. Mg(1) is bonded in a 8-coordinate geometry to two equivalent O(3), two equivalent O(4), and four equivalent O(6) atoms. There are two inequivalent V sites. In the first V site, V(1) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(3), and two equivalent O(5) atoms. In the second V site, V(2) is bonded to one O(4), one O(5), one O(6), and two equivalent O(3) atoms to form distorted VO5 trigonal bipyramids that share  a cornercorner with one Na(2)O6 octahedra and corners with three equivalent V(2)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 55°. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Na(2) and one V(1) atom. In the second O site, O(2) is bonded to two equivalent Na(2) and two equivalent V(1) atoms to form corner-sharing ONa2V2 tetrahedra. In the third O site, O(3) is bonded in a 5-coordinate geometry to one Na(1), one Mg(1), one V(1), and two equivalent V(2) atoms. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to two equivalent Na(1), two equivalent Mg(1), and two equivalent V(2) atoms. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Na(2), one V(2), and two equivalent V(1) atoms. In the sixth O site, O(6) is bonded in a distorted rectangular see-saw-like geometry to one Na(1), two equivalent Mg(1), and one V(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na2MgV4O10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.816
_cell_length_b   6.035
_cell_length_c   11.433
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   108.431
_symmetry_Int_Tables_number   1
_cell_volume   249.791
_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  0.110  0.221  0.750  1.0
  Na  Na1  1  0.912  0.824  0.250  1.0
  Mg  Mg2  1  0.363  0.727  0.750  1.0
  V  V3  1  0.211  0.422  0.399  1.0
  V  V4  1  0.211  0.422  0.101  1.0
  V  V5  1  0.801  0.601  0.586  1.0
  V  V6  1  0.801  0.601  0.914  1.0
  O  O7  1  0.068  0.135  0.112  1.0
  O  O8  1  0.068  0.135  0.388  1.0
  O  O9  1  0.286  0.572  0.250  1.0
  O  O10  1  0.263  0.526  0.581  1.0
  O  O11  1  0.263  0.526  0.919  1.0
  O  O12  1  0.737  0.474  0.750  1.0
  O  O13  1  0.761  0.523  0.074  1.0
  O  O14  1  0.761  0.523  0.426  1.0
  O  O15  1  0.942  0.884  0.636  1.0
  O  O16  1  0.942  0.884  0.864  1.0
[/CIF]
.