The structure described by Mg2Nb2VO8 crystallizes in the monoclinic C2/c space group. Mg(1) is bonded in a 6-coordinate geometry to three equivalent O(3) and three equivalent O(4) atoms. Nb(1) is bonded in a 6-coordinate geometry to one O(2), one O(4), two equivalent O(1), and two equivalent O(3) atoms. V(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form edge-sharing VO6 octahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to two equivalent Nb(1) and one V(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Nb(1) and two equivalent V(1) atoms. In the third O site, O(3) is bonded in a 5-coordinate geometry to three equivalent Mg(1) and two equivalent Nb(1) atoms. In the fourth O site, O(4) is bonded to three equivalent Mg(1) and one Nb(1) atom to form a mixture of corner and edge-sharing OMg3Nb trigonal pyramids. is represented by the CIF file [CIF]
data_Mg2Nb2VO8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.094
_cell_length_b   10.094
_cell_length_c   5.234
_cell_angle_alpha   89.521
_cell_angle_beta   89.521
_cell_angle_gamma   34.862
_symmetry_Int_Tables_number   1
_cell_volume   304.865
_cell_formula_units_Z   2
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
  Mg  Mg0  1  0.585  0.871  0.747  1.0
  Mg  Mg1  1  0.129  0.415  0.753  1.0
  Mg  Mg2  1  0.415  0.129  0.253  1.0
  Mg  Mg3  1  0.871  0.585  0.247  1.0
  Nb  Nb4  1  0.716  0.051  0.755  1.0
  Nb  Nb5  1  0.949  0.284  0.745  1.0
  Nb  Nb6  1  0.284  0.949  0.245  1.0
  Nb  Nb7  1  0.051  0.716  0.255  1.0
  V  V8  1  0.351  0.649  0.750  1.0
  V  V9  1  0.649  0.351  0.250  1.0
  O  O10  1  0.816  0.040  0.419  1.0
  O  O11  1  0.960  0.184  0.081  1.0
  O  O12  1  0.184  0.960  0.581  1.0
  O  O13  1  0.040  0.816  0.919  1.0
  O  O14  1  0.567  0.315  0.906  1.0
  O  O15  1  0.685  0.433  0.594  1.0
  O  O16  1  0.433  0.685  0.094  1.0
  O  O17  1  0.315  0.567  0.406  1.0
  O  O18  1  0.707  0.917  0.042  1.0
  O  O19  1  0.083  0.293  0.458  1.0
  O  O20  1  0.162  0.454  0.116  1.0
  O  O21  1  0.546  0.838  0.384  1.0
  O  O22  1  0.838  0.546  0.884  1.0
  O  O23  1  0.454  0.162  0.616  1.0
  O  O24  1  0.917  0.707  0.542  1.0
  O  O25  1  0.293  0.083  0.958  1.0
[/CIF]
.
The structure described by Mg2Nb2VO8 crystallizes in the monoclinic C2/c space group. Mg(1) is bonded in a 6-coordinate geometry to three equivalent O(3) and three equivalent O(4) atoms. Nb(1) is bonded in a 6-coordinate geometry to one O(2), one O(4), two equivalent O(1), and two equivalent O(3) atoms. V(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form edge-sharing VO6 octahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to two equivalent Nb(1) and one V(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Nb(1) and two equivalent V(1) atoms. In the third O site, O(3) is bonded in a 5-coordinate geometry to three equivalent Mg(1) and two equivalent Nb(1) atoms. In the fourth O site, O(4) is bonded to three equivalent Mg(1) and one Nb(1) atom to form a mixture of corner and edge-sharing OMg3Nb trigonal pyramids. is represented by the CIF file [CIF]
data_Mg2Nb2VO8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.094
_cell_length_b   10.094
_cell_length_c   5.234
_cell_angle_alpha   89.521
_cell_angle_beta   89.521
_cell_angle_gamma   34.862
_symmetry_Int_Tables_number   1
_cell_volume   304.865
_cell_formula_units_Z   2
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
  Mg  Mg0  1  0.585  0.871  0.747  1.0
  Mg  Mg1  1  0.129  0.415  0.753  1.0
  Mg  Mg2  1  0.415  0.129  0.253  1.0
  Mg  Mg3  1  0.871  0.585  0.247  1.0
  Nb  Nb4  1  0.716  0.051  0.755  1.0
  Nb  Nb5  1  0.949  0.284  0.745  1.0
  Nb  Nb6  1  0.284  0.949  0.245  1.0
  Nb  Nb7  1  0.051  0.716  0.255  1.0
  V  V8  1  0.351  0.649  0.750  1.0
  V  V9  1  0.649  0.351  0.250  1.0
  O  O10  1  0.816  0.040  0.419  1.0
  O  O11  1  0.960  0.184  0.081  1.0
  O  O12  1  0.184  0.960  0.581  1.0
  O  O13  1  0.040  0.816  0.919  1.0
  O  O14  1  0.567  0.315  0.906  1.0
  O  O15  1  0.685  0.433  0.594  1.0
  O  O16  1  0.433  0.685  0.094  1.0
  O  O17  1  0.315  0.567  0.406  1.0
  O  O18  1  0.707  0.917  0.042  1.0
  O  O19  1  0.083  0.293  0.458  1.0
  O  O20  1  0.162  0.454  0.116  1.0
  O  O21  1  0.546  0.838  0.384  1.0
  O  O22  1  0.838  0.546  0.884  1.0
  O  O23  1  0.454  0.162  0.616  1.0
  O  O24  1  0.917  0.707  0.542  1.0
  O  O25  1  0.293  0.083  0.958  1.0
[/CIF]
.