The crystal structure described by Li(Nb4O7)2 crystallizes in the orthorhombic Pbam space group. The structure consists of two 7439-93-2 atoms inside a Nb4O7 framework. In the Nb4O7 framework, there are three inequivalent Nb sites. In the first Nb site, Nb(1) is bonded to one O(2), one O(4), two equivalent O(3), and two equivalent O(6) atoms to form NbO6 octahedra that share  a cornercorner with one Nb(1)O6 octahedra, corners with two equivalent Nb(3)O5 square pyramids, corners with four equivalent Nb(2)O5 square pyramids, and edges with two equivalent Nb(3)O5 square pyramids. The corner-sharing octahedra are not tilted. In the second Nb site, Nb(2) is bonded to one O(5), two equivalent O(3), and two equivalent O(6) atoms to form NbO5 square pyramids that share corners with four equivalent Nb(1)O6 octahedra and corners with six equivalent Nb(3)O5 square pyramids. The corner-sharing octahedral tilt angles range from 4-43°. In the third Nb site, Nb(3) is bonded to one O(1), one O(3), one O(4), one O(5), and one O(6) atom to form NbO5 square pyramids that share  a cornercorner with one Nb(1)O6 octahedra, corners with three equivalent Nb(2)O5 square pyramids, corners with three equivalent Nb(3)O5 square pyramids,  an edgeedge with one Nb(1)O6 octahedra, and  an edgeedge with one Nb(3)O5 square pyramid. The corner-sharing octahedral tilt angles are 48°. There are six inequivalent O sites. In the first O site, O(1) is bonded in a square co-planar geometry to four equivalent Nb(3) atoms. In the second O site, O(2) is bonded in a linear geometry to two equivalent Nb(1) atoms. In the third O site, O(3) is bonded in a T-shaped geometry to one Nb(1), one Nb(2), and one Nb(3) atom. In the fourth O site, O(4) is bonded in a distorted T-shaped geometry to one Nb(1) and two equivalent Nb(3) atoms. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Nb(2) and two equivalent Nb(3) atoms. In the sixth O site, O(6) is bonded in a distorted T-shaped geometry to one Nb(1), one Nb(2), and one Nb(3) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_LiNb8O14
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.984
_cell_length_b   9.415
_cell_length_c   10.394
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   585.623
_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
  Li  Li0  1  0.500  0.000  0.500  1.0
  Li  Li1  1  0.500  0.500  0.000  1.0
  Nb  Nb2  1  0.000  0.114  0.660  1.0
  Nb  Nb3  1  0.500  0.120  0.167  1.0
  Nb  Nb4  1  0.265  0.127  0.923  1.0
  Nb  Nb5  1  0.735  0.127  0.923  1.0
  Nb  Nb6  1  0.265  0.373  0.423  1.0
  Nb  Nb7  1  0.735  0.373  0.423  1.0
  Nb  Nb8  1  0.500  0.380  0.667  1.0
  Nb  Nb9  1  0.000  0.386  0.160  1.0
  Nb  Nb10  1  0.000  0.614  0.840  1.0
  Nb  Nb11  1  0.500  0.620  0.333  1.0
  Nb  Nb12  1  0.265  0.627  0.577  1.0
  Nb  Nb13  1  0.735  0.627  0.577  1.0
  Nb  Nb14  1  0.265  0.873  0.077  1.0
  Nb  Nb15  1  0.735  0.873  0.077  1.0
  Nb  Nb16  1  0.500  0.880  0.833  1.0
  Nb  Nb17  1  0.000  0.886  0.340  1.0
  O  O18  1  0.000  0.000  0.000  1.0
  O  O19  1  0.000  0.000  0.500  1.0
  O  O20  1  0.250  0.005  0.748  1.0
  O  O21  1  0.750  0.005  0.748  1.0
  O  O22  1  0.000  0.235  0.822  1.0
  O  O23  1  0.500  0.242  0.345  1.0
  O  O24  1  0.249  0.245  0.589  1.0
  O  O25  1  0.751  0.245  0.589  1.0
  O  O26  1  0.249  0.255  0.089  1.0
  O  O27  1  0.751  0.255  0.089  1.0
  O  O28  1  0.500  0.258  0.845  1.0
  O  O29  1  0.000  0.265  0.322  1.0
  O  O30  1  0.750  0.495  0.248  1.0
  O  O31  1  0.250  0.495  0.248  1.0
  O  O32  1  0.000  0.500  0.500  1.0
  O  O33  1  0.000  0.500  0.000  1.0
  O  O34  1  0.250  0.505  0.752  1.0
  O  O35  1  0.750  0.505  0.752  1.0
  O  O36  1  0.000  0.735  0.678  1.0
  O  O37  1  0.500  0.742  0.155  1.0
  O  O38  1  0.249  0.745  0.911  1.0
  O  O39  1  0.751  0.745  0.911  1.0
  O  O40  1  0.249  0.755  0.411  1.0
  O  O41  1  0.751  0.755  0.411  1.0
  O  O42  1  0.500  0.758  0.655  1.0
  O  O43  1  0.000  0.765  0.178  1.0
  O  O44  1  0.250  0.995  0.252  1.0
  O  O45  1  0.750  0.995  0.252  1.0
[/CIF]
.
The crystal structure described by Li(Nb4O7)2 crystallizes in the orthorhombic Pbam space group. The structure consists of two 7439-93-2 atoms inside a Nb4O7 framework. In the Nb4O7 framework, there are three inequivalent Nb sites. In the first Nb site, Nb(1) is bonded to one O(2), one O(4), two equivalent O(3), and two equivalent O(6) atoms to form NbO6 octahedra that share  a cornercorner with one Nb(1)O6 octahedra, corners with two equivalent Nb(3)O5 square pyramids, corners with four equivalent Nb(2)O5 square pyramids, and edges with two equivalent Nb(3)O5 square pyramids. The corner-sharing octahedra are not tilted. In the second Nb site, Nb(2) is bonded to one O(5), two equivalent O(3), and two equivalent O(6) atoms to form NbO5 square pyramids that share corners with four equivalent Nb(1)O6 octahedra and corners with six equivalent Nb(3)O5 square pyramids. The corner-sharing octahedral tilt angles range from 4-43°. In the third Nb site, Nb(3) is bonded to one O(1), one O(3), one O(4), one O(5), and one O(6) atom to form NbO5 square pyramids that share  a cornercorner with one Nb(1)O6 octahedra, corners with three equivalent Nb(2)O5 square pyramids, corners with three equivalent Nb(3)O5 square pyramids,  an edgeedge with one Nb(1)O6 octahedra, and  an edgeedge with one Nb(3)O5 square pyramid. The corner-sharing octahedral tilt angles are 48°. There are six inequivalent O sites. In the first O site, O(1) is bonded in a square co-planar geometry to four equivalent Nb(3) atoms. In the second O site, O(2) is bonded in a linear geometry to two equivalent Nb(1) atoms. In the third O site, O(3) is bonded in a T-shaped geometry to one Nb(1), one Nb(2), and one Nb(3) atom. In the fourth O site, O(4) is bonded in a distorted T-shaped geometry to one Nb(1) and two equivalent Nb(3) atoms. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Nb(2) and two equivalent Nb(3) atoms. In the sixth O site, O(6) is bonded in a distorted T-shaped geometry to one Nb(1), one Nb(2), and one Nb(3) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_LiNb8O14
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.984
_cell_length_b   9.415
_cell_length_c   10.394
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   585.623
_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
  Li  Li0  1  0.500  0.000  0.500  1.0
  Li  Li1  1  0.500  0.500  0.000  1.0
  Nb  Nb2  1  0.000  0.114  0.660  1.0
  Nb  Nb3  1  0.500  0.120  0.167  1.0
  Nb  Nb4  1  0.265  0.127  0.923  1.0
  Nb  Nb5  1  0.735  0.127  0.923  1.0
  Nb  Nb6  1  0.265  0.373  0.423  1.0
  Nb  Nb7  1  0.735  0.373  0.423  1.0
  Nb  Nb8  1  0.500  0.380  0.667  1.0
  Nb  Nb9  1  0.000  0.386  0.160  1.0
  Nb  Nb10  1  0.000  0.614  0.840  1.0
  Nb  Nb11  1  0.500  0.620  0.333  1.0
  Nb  Nb12  1  0.265  0.627  0.577  1.0
  Nb  Nb13  1  0.735  0.627  0.577  1.0
  Nb  Nb14  1  0.265  0.873  0.077  1.0
  Nb  Nb15  1  0.735  0.873  0.077  1.0
  Nb  Nb16  1  0.500  0.880  0.833  1.0
  Nb  Nb17  1  0.000  0.886  0.340  1.0
  O  O18  1  0.000  0.000  0.000  1.0
  O  O19  1  0.000  0.000  0.500  1.0
  O  O20  1  0.250  0.005  0.748  1.0
  O  O21  1  0.750  0.005  0.748  1.0
  O  O22  1  0.000  0.235  0.822  1.0
  O  O23  1  0.500  0.242  0.345  1.0
  O  O24  1  0.249  0.245  0.589  1.0
  O  O25  1  0.751  0.245  0.589  1.0
  O  O26  1  0.249  0.255  0.089  1.0
  O  O27  1  0.751  0.255  0.089  1.0
  O  O28  1  0.500  0.258  0.845  1.0
  O  O29  1  0.000  0.265  0.322  1.0
  O  O30  1  0.750  0.495  0.248  1.0
  O  O31  1  0.250  0.495  0.248  1.0
  O  O32  1  0.000  0.500  0.500  1.0
  O  O33  1  0.000  0.500  0.000  1.0
  O  O34  1  0.250  0.505  0.752  1.0
  O  O35  1  0.750  0.505  0.752  1.0
  O  O36  1  0.000  0.735  0.678  1.0
  O  O37  1  0.500  0.742  0.155  1.0
  O  O38  1  0.249  0.745  0.911  1.0
  O  O39  1  0.751  0.745  0.911  1.0
  O  O40  1  0.249  0.755  0.411  1.0
  O  O41  1  0.751  0.755  0.411  1.0
  O  O42  1  0.500  0.758  0.655  1.0
  O  O43  1  0.000  0.765  0.178  1.0
  O  O44  1  0.250  0.995  0.252  1.0
  O  O45  1  0.750  0.995  0.252  1.0
[/CIF]
.