The compound described by MgV4O10 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(2), one O(5), one O(7), and one O(8) atom to form MgO4 tetrahedra that share  a cornercorner with one V(1)O4 tetrahedra,  a cornercorner with one V(2)O4 tetrahedra,  a cornercorner with one V(3)O5 trigonal bipyramid, and corners with two equivalent V(4)O5 trigonal bipyramids. There are four inequivalent V sites. In the first V site, V(1) is bonded to one O(1), one O(3), one O(5), and one O(9) atom to form VO4 tetrahedra that share  a cornercorner with one Mg(1)O4 tetrahedra, corners with two equivalent V(3)O5 trigonal bipyramids, and corners with two equivalent V(4)O5 trigonal bipyramids. In the second V site, V(2) is bonded to one O(10), one O(2), one O(4), and one O(6) atom to form VO4 tetrahedra that share  a cornercorner with one Mg(1)O4 tetrahedra, corners with two equivalent V(3)O5 trigonal bipyramids, and corners with two equivalent V(4)O5 trigonal bipyramids. In the third V site, V(3) is bonded to one O(1), one O(10), one O(3), one O(4), and one O(7) atom to form distorted VO5 trigonal bipyramids that share  a cornercorner with one Mg(1)O4 tetrahedra, corners with two equivalent V(1)O4 tetrahedra, corners with two equivalent V(2)O4 tetrahedra, and  an edgeedge with one V(4)O5 trigonal bipyramid. In the fourth V site, V(4) is bonded to one O(2), one O(3), one O(4), one O(8), and one O(9) atom to form distorted VO5 trigonal bipyramids that share corners with two equivalent Mg(1)O4 tetrahedra, corners with two equivalent V(1)O4 tetrahedra, corners with two equivalent V(2)O4 tetrahedra, and  an edgeedge with one V(3)O5 trigonal bipyramid. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one V(1) and one V(3) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to one Mg(1), one V(2), and one V(4) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one V(1), one V(3), and one V(4) atom. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one V(2), one V(3), and one V(4) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Mg(1) and one V(1) atom. In the sixth O site, O(6) is bonded in a single-bond geometry to one V(2) atom. In the seventh O site, O(7) is bonded in a linear geometry to one Mg(1) and one V(3) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Mg(1) and one V(4) atom. In the ninth O site, O(9) is bonded in a linear geometry to one V(1) and one V(4) atom. In the tenth O site, O(10) is bonded in a bent 150 degrees geometry to one V(2) and one V(3) atom. is represented by the CIF file [CIF]
data_MgV4O10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.875
_cell_length_b   6.712
_cell_length_c   7.642
_cell_angle_alpha   72.581
_cell_angle_beta   69.109
_cell_angle_gamma   75.645
_symmetry_Int_Tables_number   1
_cell_volume   265.235
_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  0.704  0.977  0.863  1.0
  V  V1  1  0.133  0.702  0.568  1.0
  V  V2  1  0.859  0.295  0.433  1.0
  V  V3  1  0.699  0.861  0.353  1.0
  V  V4  1  0.300  0.138  0.621  1.0
  O  O5  1  0.025  0.816  0.372  1.0
  O  O6  1  0.938  0.168  0.656  1.0
  O  O7  1  0.361  0.867  0.538  1.0
  O  O8  1  0.639  0.136  0.435  1.0
  O  O9  1  0.895  0.721  0.771  1.0
  O  O10  1  0.118  0.277  0.260  1.0
  O  O11  1  0.699  0.941  0.124  1.0
  O  O12  1  0.370  0.055  0.829  1.0
  O  O13  1  0.254  0.440  0.568  1.0
  O  O14  1  0.724  0.557  0.423  1.0
[/CIF]
.
The compound described by MgV4O10 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(2), one O(5), one O(7), and one O(8) atom to form MgO4 tetrahedra that share  a cornercorner with one V(1)O4 tetrahedra,  a cornercorner with one V(2)O4 tetrahedra,  a cornercorner with one V(3)O5 trigonal bipyramid, and corners with two equivalent V(4)O5 trigonal bipyramids. There are four inequivalent V sites. In the first V site, V(1) is bonded to one O(1), one O(3), one O(5), and one O(9) atom to form VO4 tetrahedra that share  a cornercorner with one Mg(1)O4 tetrahedra, corners with two equivalent V(3)O5 trigonal bipyramids, and corners with two equivalent V(4)O5 trigonal bipyramids. In the second V site, V(2) is bonded to one O(10), one O(2), one O(4), and one O(6) atom to form VO4 tetrahedra that share  a cornercorner with one Mg(1)O4 tetrahedra, corners with two equivalent V(3)O5 trigonal bipyramids, and corners with two equivalent V(4)O5 trigonal bipyramids. In the third V site, V(3) is bonded to one O(1), one O(10), one O(3), one O(4), and one O(7) atom to form distorted VO5 trigonal bipyramids that share  a cornercorner with one Mg(1)O4 tetrahedra, corners with two equivalent V(1)O4 tetrahedra, corners with two equivalent V(2)O4 tetrahedra, and  an edgeedge with one V(4)O5 trigonal bipyramid. In the fourth V site, V(4) is bonded to one O(2), one O(3), one O(4), one O(8), and one O(9) atom to form distorted VO5 trigonal bipyramids that share corners with two equivalent Mg(1)O4 tetrahedra, corners with two equivalent V(1)O4 tetrahedra, corners with two equivalent V(2)O4 tetrahedra, and  an edgeedge with one V(3)O5 trigonal bipyramid. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one V(1) and one V(3) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to one Mg(1), one V(2), and one V(4) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one V(1), one V(3), and one V(4) atom. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one V(2), one V(3), and one V(4) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Mg(1) and one V(1) atom. In the sixth O site, O(6) is bonded in a single-bond geometry to one V(2) atom. In the seventh O site, O(7) is bonded in a linear geometry to one Mg(1) and one V(3) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Mg(1) and one V(4) atom. In the ninth O site, O(9) is bonded in a linear geometry to one V(1) and one V(4) atom. In the tenth O site, O(10) is bonded in a bent 150 degrees geometry to one V(2) and one V(3) atom. is represented by the CIF file [CIF]
data_MgV4O10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.875
_cell_length_b   6.712
_cell_length_c   7.642
_cell_angle_alpha   72.581
_cell_angle_beta   69.109
_cell_angle_gamma   75.645
_symmetry_Int_Tables_number   1
_cell_volume   265.235
_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  0.704  0.977  0.863  1.0
  V  V1  1  0.133  0.702  0.568  1.0
  V  V2  1  0.859  0.295  0.433  1.0
  V  V3  1  0.699  0.861  0.353  1.0
  V  V4  1  0.300  0.138  0.621  1.0
  O  O5  1  0.025  0.816  0.372  1.0
  O  O6  1  0.938  0.168  0.656  1.0
  O  O7  1  0.361  0.867  0.538  1.0
  O  O8  1  0.639  0.136  0.435  1.0
  O  O9  1  0.895  0.721  0.771  1.0
  O  O10  1  0.118  0.277  0.260  1.0
  O  O11  1  0.699  0.941  0.124  1.0
  O  O12  1  0.370  0.055  0.829  1.0
  O  O13  1  0.254  0.440  0.568  1.0
  O  O14  1  0.724  0.557  0.423  1.0
[/CIF]
.