The material structure described by MgNb4O10 crystallizes in the triclinic P1 space group. Mg(1) is bonded in a 6-coordinate geometry to one O(1), one O(10), one O(5), one O(6), one O(7), and one O(9) atom. There are four inequivalent Nb sites. In the first Nb site, Nb(1) is bonded to one O(1), one O(2), one O(3), one O(6), one O(8), and one O(9) atom to form a mixture of distorted corner and edge-sharing NbO6 octahedra. The corner-sharing octahedral tilt angles range from 26-62°. In the second Nb site, Nb(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 a mixture of corner and edge-sharing NbO6 octahedra. The corner-sharing octahedral tilt angles range from 29-62°. In the third Nb site, Nb(3) is bonded to one O(1), one O(10), one O(3), one O(4), one O(5), and one O(7) atom to form a mixture of distorted corner and edge-sharing NbO6 octahedra. The corner-sharing octahedral tilt angles range from 29-56°. In the fourth Nb site, Nb(4) is bonded to one O(2), one O(3), one O(4), one O(5), one O(8), and one O(9) atom to form a mixture of corner and edge-sharing NbO6 octahedra. The corner-sharing octahedral tilt angles range from 26-56°. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Mg(1), one Nb(1), one Nb(2), and one Nb(3) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Nb(1), one Nb(2), and one Nb(4) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Nb(1), one Nb(3), and one Nb(4) atom. In the fourth O site, O(4) is bonded in a distorted T-shaped geometry to one Nb(2), one Nb(3), and one Nb(4) atom. In the fifth O site, O(5) is bonded in a T-shaped geometry to one Mg(1), one Nb(3), and one Nb(4) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Mg(1), one Nb(1), and one Nb(2) atom. In the seventh O site, O(7) is bonded in a T-shaped geometry to one Mg(1), one Nb(2), and one Nb(3) atom. In the eighth O site, O(8) is bonded in a bent 150 degrees geometry to one Nb(1) and one Nb(4) atom. In the ninth O site, O(9) is bonded in a distorted trigonal non-coplanar geometry to one Mg(1), one Nb(1), and one Nb(4) atom. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to one Mg(1), one Nb(2), and one Nb(3) atom. is represented by the CIF file [CIF]
data_MgNb4O10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.113
_cell_length_b   5.689
_cell_length_c   7.068
_cell_angle_alpha   102.891
_cell_angle_beta   111.781
_cell_angle_gamma   90.062
_symmetry_Int_Tables_number   1
_cell_volume   185.330
_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  0.705  0.350  0.943  1.0
  Nb  Nb1  1  0.386  0.274  0.260  1.0
  Nb  Nb2  1  0.069  0.198  0.663  1.0
  Nb  Nb3  1  0.597  0.732  0.727  1.0
  Nb  Nb4  1  0.922  0.795  0.320  1.0
  O  O5  1  0.734  0.370  0.607  1.0
  O  O6  1  0.148  0.150  0.396  1.0
  O  O7  1  0.276  0.639  0.409  1.0
  O  O8  1  0.860  0.847  0.600  1.0
  O  O9  1  0.864  0.728  1.000  1.0
  O  O10  1  0.095  0.247  0.989  1.0
  O  O11  1  0.350  0.499  0.770  1.0
  O  O12  1  0.576  0.999  0.231  1.0
  O  O13  1  0.665  0.480  0.220  1.0
  O  O14  1  0.454  0.037  0.792  1.0
[/CIF]
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The material structure described by MgNb4O10 crystallizes in the triclinic P1 space group. Mg(1) is bonded in a 6-coordinate geometry to one O(1), one O(10), one O(5), one O(6), one O(7), and one O(9) atom. There are four inequivalent Nb sites. In the first Nb site, Nb(1) is bonded to one O(1), one O(2), one O(3), one O(6), one O(8), and one O(9) atom to form a mixture of distorted corner and edge-sharing NbO6 octahedra. The corner-sharing octahedral tilt angles range from 26-62°. In the second Nb site, Nb(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 a mixture of corner and edge-sharing NbO6 octahedra. The corner-sharing octahedral tilt angles range from 29-62°. In the third Nb site, Nb(3) is bonded to one O(1), one O(10), one O(3), one O(4), one O(5), and one O(7) atom to form a mixture of distorted corner and edge-sharing NbO6 octahedra. The corner-sharing octahedral tilt angles range from 29-56°. In the fourth Nb site, Nb(4) is bonded to one O(2), one O(3), one O(4), one O(5), one O(8), and one O(9) atom to form a mixture of corner and edge-sharing NbO6 octahedra. The corner-sharing octahedral tilt angles range from 26-56°. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Mg(1), one Nb(1), one Nb(2), and one Nb(3) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Nb(1), one Nb(2), and one Nb(4) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Nb(1), one Nb(3), and one Nb(4) atom. In the fourth O site, O(4) is bonded in a distorted T-shaped geometry to one Nb(2), one Nb(3), and one Nb(4) atom. In the fifth O site, O(5) is bonded in a T-shaped geometry to one Mg(1), one Nb(3), and one Nb(4) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Mg(1), one Nb(1), and one Nb(2) atom. In the seventh O site, O(7) is bonded in a T-shaped geometry to one Mg(1), one Nb(2), and one Nb(3) atom. In the eighth O site, O(8) is bonded in a bent 150 degrees geometry to one Nb(1) and one Nb(4) atom. In the ninth O site, O(9) is bonded in a distorted trigonal non-coplanar geometry to one Mg(1), one Nb(1), and one Nb(4) atom. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to one Mg(1), one Nb(2), and one Nb(3) atom. is represented by the CIF file [CIF]
data_MgNb4O10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.113
_cell_length_b   5.689
_cell_length_c   7.068
_cell_angle_alpha   102.891
_cell_angle_beta   111.781
_cell_angle_gamma   90.062
_symmetry_Int_Tables_number   1
_cell_volume   185.330
_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  0.705  0.350  0.943  1.0
  Nb  Nb1  1  0.386  0.274  0.260  1.0
  Nb  Nb2  1  0.069  0.198  0.663  1.0
  Nb  Nb3  1  0.597  0.732  0.727  1.0
  Nb  Nb4  1  0.922  0.795  0.320  1.0
  O  O5  1  0.734  0.370  0.607  1.0
  O  O6  1  0.148  0.150  0.396  1.0
  O  O7  1  0.276  0.639  0.409  1.0
  O  O8  1  0.860  0.847  0.600  1.0
  O  O9  1  0.864  0.728  1.000  1.0
  O  O10  1  0.095  0.247  0.989  1.0
  O  O11  1  0.350  0.499  0.770  1.0
  O  O12  1  0.576  0.999  0.231  1.0
  O  O13  1  0.665  0.480  0.220  1.0
  O  O14  1  0.454  0.037  0.792  1.0
[/CIF]
.