The compound described by MgV2MnO6 crystallizes in the monoclinic Cm space group. Mg(1) is bonded to one O(1), one O(4), one O(5), and two equivalent O(2) atoms to form distorted MgO5 trigonal bipyramids that share  a cornercorner with one V(2)O6 octahedra, corners with two equivalent Mg(1)O5 trigonal bipyramids, corners with two equivalent V(1)O5 trigonal bipyramids, and edges with two equivalent V(2)O6 octahedra. The corner-sharing octahedral tilt angles are 38°. There are two inequivalent V sites. In the first V site, V(1) is bonded to one O(1), one O(3), one O(5), and two equivalent O(6) atoms to form distorted VO5 trigonal bipyramids that share  a cornercorner with one V(2)O6 octahedra, corners with two equivalent Mg(1)O5 trigonal bipyramids, corners with two equivalent V(1)O5 trigonal bipyramids, and edges with two equivalent V(2)O6 octahedra. The corner-sharing octahedral tilt angles are 47°. In the second V site, V(2) is bonded to one O(2), one O(3), one O(4), one O(6), and two equivalent O(5) atoms to form distorted VO6 octahedra that share corners with two equivalent V(2)O6 octahedra,  a cornercorner with one Mg(1)O5 trigonal bipyramid,  a cornercorner with one V(1)O5 trigonal bipyramid, edges with two equivalent Mg(1)O5 trigonal bipyramids, and edges with two equivalent V(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 27°. Mn(1) is bonded in a 6-coordinate geometry to one O(2), one O(3), one O(4), one O(6), and two equivalent O(1) atoms. There are six inequivalent O sites. In the first O site, O(1) is bonded to one Mg(1), one V(1), and two equivalent Mn(1) atoms to form OMgMn2V tetrahedra that share corners with two equivalent O(1)MgMn2V tetrahedra, corners with two equivalent O(5)MgV3 tetrahedra, edges with two equivalent O(6)MnV3 tetrahedra, and edges with two equivalent O(2)Mg2MnV trigonal pyramids. In the second O site, O(2) is bonded to two equivalent Mg(1), one V(2), and one Mn(1) atom to form distorted OMg2MnV trigonal pyramids that share corners with two equivalent O(6)MnV3 tetrahedra, corners with two equivalent O(2)Mg2MnV trigonal pyramids, edges with two equivalent O(1)MgMn2V tetrahedra, and edges with two equivalent O(5)MgV3 tetrahedra. In the third O site, O(3) is bonded in a 3-coordinate geometry to one V(1), one V(2), and one Mn(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Mg(1), one V(2), and one Mn(1) atom. In the fifth O site, O(5) is bonded to one Mg(1), one V(1), and two equivalent V(2) atoms to form OMgV3 tetrahedra that share corners with two equivalent O(1)MgMn2V tetrahedra, corners with two equivalent O(5)MgV3 tetrahedra, edges with two equivalent O(6)MnV3 tetrahedra, and edges with two equivalent O(2)Mg2MnV trigonal pyramids. In the sixth O site, O(6) is bonded to one V(2), two equivalent V(1), and one Mn(1) atom to form distorted OMnV3 tetrahedra that share corners with two equivalent O(6)MnV3 tetrahedra, corners with two equivalent O(2)Mg2MnV trigonal pyramids, edges with two equivalent O(1)MgMn2V tetrahedra, and edges with two equivalent O(5)MgV3 tetrahedra. is represented by the CIF file [CIF]
data_MgMnV2O6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.971
_cell_length_b   5.316
_cell_length_c   6.612
_cell_angle_alpha   88.911
_cell_angle_beta   89.993
_cell_angle_gamma   111.920
_symmetry_Int_Tables_number   1
_cell_volume   129.445
_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
  Mg  Mg0  1  0.820  0.638  0.821  1.0
  Mn  Mn1  1  0.133  0.265  0.072  1.0
  V  V2  1  0.810  0.619  0.331  1.0
  V  V3  1  0.149  0.297  0.602  1.0
  O  O4  1  0.716  0.430  0.088  1.0
  O  O5  1  0.284  0.566  0.795  1.0
  O  O6  1  0.987  0.972  0.331  1.0
  O  O7  1  0.017  0.033  0.789  1.0
  O  O8  1  0.693  0.385  0.570  1.0
  O  O9  1  0.267  0.532  0.351  1.0
[/CIF]
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The compound described by MgV2MnO6 crystallizes in the monoclinic Cm space group. Mg(1) is bonded to one O(1), one O(4), one O(5), and two equivalent O(2) atoms to form distorted MgO5 trigonal bipyramids that share  a cornercorner with one V(2)O6 octahedra, corners with two equivalent Mg(1)O5 trigonal bipyramids, corners with two equivalent V(1)O5 trigonal bipyramids, and edges with two equivalent V(2)O6 octahedra. The corner-sharing octahedral tilt angles are 38°. There are two inequivalent V sites. In the first V site, V(1) is bonded to one O(1), one O(3), one O(5), and two equivalent O(6) atoms to form distorted VO5 trigonal bipyramids that share  a cornercorner with one V(2)O6 octahedra, corners with two equivalent Mg(1)O5 trigonal bipyramids, corners with two equivalent V(1)O5 trigonal bipyramids, and edges with two equivalent V(2)O6 octahedra. The corner-sharing octahedral tilt angles are 47°. In the second V site, V(2) is bonded to one O(2), one O(3), one O(4), one O(6), and two equivalent O(5) atoms to form distorted VO6 octahedra that share corners with two equivalent V(2)O6 octahedra,  a cornercorner with one Mg(1)O5 trigonal bipyramid,  a cornercorner with one V(1)O5 trigonal bipyramid, edges with two equivalent Mg(1)O5 trigonal bipyramids, and edges with two equivalent V(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 27°. Mn(1) is bonded in a 6-coordinate geometry to one O(2), one O(3), one O(4), one O(6), and two equivalent O(1) atoms. There are six inequivalent O sites. In the first O site, O(1) is bonded to one Mg(1), one V(1), and two equivalent Mn(1) atoms to form OMgMn2V tetrahedra that share corners with two equivalent O(1)MgMn2V tetrahedra, corners with two equivalent O(5)MgV3 tetrahedra, edges with two equivalent O(6)MnV3 tetrahedra, and edges with two equivalent O(2)Mg2MnV trigonal pyramids. In the second O site, O(2) is bonded to two equivalent Mg(1), one V(2), and one Mn(1) atom to form distorted OMg2MnV trigonal pyramids that share corners with two equivalent O(6)MnV3 tetrahedra, corners with two equivalent O(2)Mg2MnV trigonal pyramids, edges with two equivalent O(1)MgMn2V tetrahedra, and edges with two equivalent O(5)MgV3 tetrahedra. In the third O site, O(3) is bonded in a 3-coordinate geometry to one V(1), one V(2), and one Mn(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Mg(1), one V(2), and one Mn(1) atom. In the fifth O site, O(5) is bonded to one Mg(1), one V(1), and two equivalent V(2) atoms to form OMgV3 tetrahedra that share corners with two equivalent O(1)MgMn2V tetrahedra, corners with two equivalent O(5)MgV3 tetrahedra, edges with two equivalent O(6)MnV3 tetrahedra, and edges with two equivalent O(2)Mg2MnV trigonal pyramids. In the sixth O site, O(6) is bonded to one V(2), two equivalent V(1), and one Mn(1) atom to form distorted OMnV3 tetrahedra that share corners with two equivalent O(6)MnV3 tetrahedra, corners with two equivalent O(2)Mg2MnV trigonal pyramids, edges with two equivalent O(1)MgMn2V tetrahedra, and edges with two equivalent O(5)MgV3 tetrahedra. is represented by the CIF file [CIF]
data_MgMnV2O6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.971
_cell_length_b   5.316
_cell_length_c   6.612
_cell_angle_alpha   88.911
_cell_angle_beta   89.993
_cell_angle_gamma   111.920
_symmetry_Int_Tables_number   1
_cell_volume   129.445
_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
  Mg  Mg0  1  0.820  0.638  0.821  1.0
  Mn  Mn1  1  0.133  0.265  0.072  1.0
  V  V2  1  0.810  0.619  0.331  1.0
  V  V3  1  0.149  0.297  0.602  1.0
  O  O4  1  0.716  0.430  0.088  1.0
  O  O5  1  0.284  0.566  0.795  1.0
  O  O6  1  0.987  0.972  0.331  1.0
  O  O7  1  0.017  0.033  0.789  1.0
  O  O8  1  0.693  0.385  0.570  1.0
  O  O9  1  0.267  0.532  0.351  1.0
[/CIF]
.