The structure described by MgV2Ni(TeO5)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(1), one O(2), one O(3), one O(4), and one O(6) atom to form MgO5 square pyramids that share  an edgeedge with one V(1)O6 octahedra and edges with two equivalent V(2)O6 octahedra. There are two inequivalent V sites. In the first V site, V(1) is bonded to one O(1), one O(10), one O(4), one O(5), one O(7), and one O(9) atom to form distorted VO6 octahedra that share edges with two equivalent V(2)O6 octahedra and  an edgeedge with one Mg(1)O5 square pyramid. In the second V site, V(2) is bonded to one O(1), one O(10), one O(2), one O(4), one O(6), and one O(7) atom to form VO6 octahedra that share edges with two equivalent V(1)O6 octahedra and edges with two equivalent Mg(1)O5 square pyramids. Ni(1) is bonded in a 5-coordinate geometry to one O(1), one O(10), one O(2), one O(8), and one O(9) atom. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded in a 3-coordinate geometry to one O(6), one O(7), and one O(8) atom. In the second Te site, Te(2) is bonded in a 3-coordinate geometry to one O(3), one O(4), one O(5), and one O(8) atom. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a trigonal pyramidal geometry to one Mg(1), one V(1), one V(2), and one Ni(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Mg(1), one V(2), and one Ni(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Mg(1) and one Te(2) atom. In the fourth O site, O(4) is bonded in a rectangular see-saw-like geometry to one Mg(1), one V(1), one V(2), and one Te(2) atom. In the fifth O site, O(5) is bonded in a distorted bent 150 degrees geometry to one V(1) and one Te(2) atom. In the sixth O site, O(6) is bonded in a T-shaped geometry to one Mg(1), one V(2), and one Te(1) atom. In the seventh O site, O(7) is bonded in a distorted trigonal non-coplanar geometry to one V(1), one V(2), and one Te(1) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Ni(1), one Te(1), and one Te(2) atom. In the ninth O site, O(9) is bonded in a 2-coordinate geometry to one V(1) and one Ni(1) atom. In the tenth O site, O(10) is bonded in a trigonal planar geometry to one V(1), one V(2), and one Ni(1) atom. is represented by the CIF file [CIF]
data_MgV2Ni(TeO5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.152
_cell_length_b   6.739
_cell_length_c   6.586
_cell_angle_alpha   89.967
_cell_angle_beta   65.744
_cell_angle_gamma   78.552
_symmetry_Int_Tables_number   1
_cell_volume   203.492
_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  0.942  0.237  0.247  1.0
  V  V1  1  0.673  0.613  0.611  1.0
  V  V2  1  0.313  0.397  0.413  1.0
  Ni  Ni3  1  0.991  0.562  0.988  1.0
  Te  Te4  1  0.332  0.847  0.236  1.0
  Te  Te5  1  0.676  0.117  0.781  1.0
  O  O6  1  0.016  0.512  0.299  1.0
  O  O7  1  0.633  0.360  0.151  1.0
  O  O8  1  0.274  0.131  0.952  1.0
  O  O9  1  0.604  0.308  0.564  1.0
  O  O10  1  0.752  0.888  0.578  1.0
  O  O11  1  0.215  0.117  0.400  1.0
  O  O12  1  0.409  0.678  0.449  1.0
  O  O13  1  0.731  0.849  0.058  1.0
  O  O14  1  0.378  0.640  0.868  1.0
  O  O15  1  0.992  0.485  0.695  1.0
[/CIF]
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The structure described by MgV2Ni(TeO5)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(1), one O(2), one O(3), one O(4), and one O(6) atom to form MgO5 square pyramids that share  an edgeedge with one V(1)O6 octahedra and edges with two equivalent V(2)O6 octahedra. There are two inequivalent V sites. In the first V site, V(1) is bonded to one O(1), one O(10), one O(4), one O(5), one O(7), and one O(9) atom to form distorted VO6 octahedra that share edges with two equivalent V(2)O6 octahedra and  an edgeedge with one Mg(1)O5 square pyramid. In the second V site, V(2) is bonded to one O(1), one O(10), one O(2), one O(4), one O(6), and one O(7) atom to form VO6 octahedra that share edges with two equivalent V(1)O6 octahedra and edges with two equivalent Mg(1)O5 square pyramids. Ni(1) is bonded in a 5-coordinate geometry to one O(1), one O(10), one O(2), one O(8), and one O(9) atom. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded in a 3-coordinate geometry to one O(6), one O(7), and one O(8) atom. In the second Te site, Te(2) is bonded in a 3-coordinate geometry to one O(3), one O(4), one O(5), and one O(8) atom. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a trigonal pyramidal geometry to one Mg(1), one V(1), one V(2), and one Ni(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Mg(1), one V(2), and one Ni(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Mg(1) and one Te(2) atom. In the fourth O site, O(4) is bonded in a rectangular see-saw-like geometry to one Mg(1), one V(1), one V(2), and one Te(2) atom. In the fifth O site, O(5) is bonded in a distorted bent 150 degrees geometry to one V(1) and one Te(2) atom. In the sixth O site, O(6) is bonded in a T-shaped geometry to one Mg(1), one V(2), and one Te(1) atom. In the seventh O site, O(7) is bonded in a distorted trigonal non-coplanar geometry to one V(1), one V(2), and one Te(1) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Ni(1), one Te(1), and one Te(2) atom. In the ninth O site, O(9) is bonded in a 2-coordinate geometry to one V(1) and one Ni(1) atom. In the tenth O site, O(10) is bonded in a trigonal planar geometry to one V(1), one V(2), and one Ni(1) atom. is represented by the CIF file [CIF]
data_MgV2Ni(TeO5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.152
_cell_length_b   6.739
_cell_length_c   6.586
_cell_angle_alpha   89.967
_cell_angle_beta   65.744
_cell_angle_gamma   78.552
_symmetry_Int_Tables_number   1
_cell_volume   203.492
_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  0.942  0.237  0.247  1.0
  V  V1  1  0.673  0.613  0.611  1.0
  V  V2  1  0.313  0.397  0.413  1.0
  Ni  Ni3  1  0.991  0.562  0.988  1.0
  Te  Te4  1  0.332  0.847  0.236  1.0
  Te  Te5  1  0.676  0.117  0.781  1.0
  O  O6  1  0.016  0.512  0.299  1.0
  O  O7  1  0.633  0.360  0.151  1.0
  O  O8  1  0.274  0.131  0.952  1.0
  O  O9  1  0.604  0.308  0.564  1.0
  O  O10  1  0.752  0.888  0.578  1.0
  O  O11  1  0.215  0.117  0.400  1.0
  O  O12  1  0.409  0.678  0.449  1.0
  O  O13  1  0.731  0.849  0.058  1.0
  O  O14  1  0.378  0.640  0.868  1.0
  O  O15  1  0.992  0.485  0.695  1.0
[/CIF]
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