The material described by Ba4Nb14O23 crystallizes in the orthorhombic Cmmm space group. Ba(1) is bonded to one O(2), one O(5), one O(7), one O(9), two equivalent O(1), two equivalent O(3), two equivalent O(4), and two equivalent O(6) atoms to form BaO12 cuboctahedra that share corners with five equivalent Ba(1)O12 cuboctahedra, corners with two equivalent Nb(2)O5 square pyramids, faces with four equivalent Ba(1)O12 cuboctahedra, faces with two equivalent Nb(1)O6 octahedra, faces with two equivalent Nb(2)O5 square pyramids, faces with two equivalent Nb(3)O5 square pyramids, and faces with two equivalent Nb(4)O5 square pyramids. There are seven inequivalent Nb sites. In the first Nb site, Nb(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form NbO6 octahedra that share corners with two equivalent Nb(1)O6 octahedra, corners with two equivalent Nb(3)O5 square pyramids, corners with two equivalent Nb(4)O5 square pyramids, and faces with eight equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedra are not tilted. In the second Nb site, Nb(2) is bonded to one O(6), two equivalent O(4), and two equivalent O(5) atoms to form NbO5 square pyramids that share corners with two equivalent Ba(1)O12 cuboctahedra,  a cornercorner with one Nb(3)O5 square pyramid, corners with two equivalent Nb(2)O5 square pyramids, corners with two equivalent Nb(4)O5 square pyramids,  an edgeedge with one Nb(2)O5 square pyramid, and faces with two equivalent Ba(1)O12 cuboctahedra. In the third Nb site, Nb(3) is bonded to one O(1), two equivalent O(6), and two equivalent O(7) atoms to form NbO5 square pyramids that share  a cornercorner with one Nb(1)O6 octahedra, corners with two equivalent Nb(2)O5 square pyramids, corners with two equivalent Nb(3)O5 square pyramids, and faces with four equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedra are not tilted. In the fourth Nb site, Nb(4) is bonded to one O(3), two equivalent O(4), and two equivalent O(9) atoms to form NbO5 square pyramids that share  a cornercorner with one Nb(1)O6 octahedra, corners with two equivalent Nb(4)O5 square pyramids, corners with four equivalent Nb(2)O5 square pyramids, and faces with four equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedra are not tilted. In the fifth Nb site, Nb(5) is bonded in a square co-planar geometry to one O(8), one O(9), and two equivalent O(5) atoms. In the sixth Nb site, Nb(6) is bonded in a rectangular see-saw-like geometry to two equivalent O(6) and two equivalent O(8) atoms. In the seventh Nb site, Nb(7) is bonded in a square co-planar geometry to two equivalent O(7) and two equivalent O(8) atoms. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to four equivalent Ba(1), one Nb(1), and one Nb(3) atom. In the second O site, O(2) is bonded in a distorted linear geometry to four equivalent Ba(1) and two equivalent Nb(1) atoms. In the third O site, O(3) is bonded in a distorted linear geometry to four equivalent Ba(1), one Nb(1), and one Nb(4) atom. In the fourth O site, O(4) is bonded to two equivalent Ba(1), one Nb(4), and two equivalent Nb(2) atoms to form a mixture of distorted corner, edge, and face-sharing OBa2Nb3 trigonal bipyramids. In the fifth O site, O(5) is bonded in a distorted rectangular see-saw-like geometry to one Ba(1), one Nb(5), and two equivalent Nb(2) atoms. In the sixth O site, O(6) is bonded to two equivalent Ba(1), one Nb(2), one Nb(3), and one Nb(6) atom to form a mixture of distorted corner, edge, and face-sharing OBa2Nb3 trigonal bipyramids. In the seventh O site, O(7) is bonded to two equivalent Ba(1), one Nb(7), and two equivalent Nb(3) atoms to form a mixture of distorted corner and edge-sharing OBa2Nb3 trigonal bipyramids. In the eighth O site, O(8) is bonded in a square co-planar geometry to one Nb(5), one Nb(7), and two equivalent Nb(6) atoms. In the ninth O site, O(9) is bonded to two equivalent Ba(1), one Nb(5), and two equivalent Nb(4) atoms to form a mixture of distorted corner and edge-sharing OBa2Nb3 trigonal bipyramids. is represented by the CIF file [CIF]
data_Ba4Nb14O23
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.237
_cell_length_b   12.237
_cell_length_c   4.186
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   118.229
_symmetry_Int_Tables_number   1
_cell_volume   552.192
_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
  Ba  Ba0  1  0.229  0.433  0.000  1.0
  Ba  Ba1  1  0.771  0.567  1.000  1.0
  Ba  Ba2  1  0.433  0.229  0.000  1.0
  Ba  Ba3  1  0.567  0.771  1.000  1.0
  Nb  Nb4  1  0.500  0.500  0.500  1.0
  Nb  Nb5  1  0.958  0.360  0.500  1.0
  Nb  Nb6  1  0.042  0.640  0.500  1.0
  Nb  Nb7  1  0.360  0.958  0.500  1.0
  Nb  Nb8  1  0.640  0.042  0.500  1.0
  Nb  Nb9  1  0.163  0.163  0.500  1.0
  Nb  Nb10  1  0.837  0.837  0.500  1.0
  Nb  Nb11  1  0.297  0.703  0.500  1.0
  Nb  Nb12  1  0.703  0.297  0.500  1.0
  Nb  Nb13  1  0.203  0.797  1.000  1.0
  Nb  Nb14  1  0.797  0.203  1.000  1.0
  Nb  Nb15  1  0.099  0.901  0.500  1.0
  Nb  Nb16  1  0.901  0.099  0.500  1.0
  Nb  Nb17  1  0.000  1.000  0.000  1.0
  O  O18  1  0.661  0.661  0.500  1.0
  O  O19  1  0.339  0.339  0.500  1.0
  O  O20  1  0.500  0.500  1.000  1.0
  O  O21  1  0.404  0.596  0.500  1.0
  O  O22  1  0.596  0.404  0.500  1.0
  O  O23  1  0.865  0.468  0.500  1.0
  O  O24  1  0.135  0.532  0.500  1.0
  O  O25  1  0.468  0.865  0.500  1.0
  O  O26  1  0.532  0.135  0.500  1.0
  O  O27  1  0.971  0.363  1.000  1.0
  O  O28  1  0.029  0.637  0.000  1.0
  O  O29  1  0.363  0.971  1.000  1.0
  O  O30  1  0.637  0.029  1.000  1.0
  O  O31  1  0.070  0.270  0.500  1.0
  O  O32  1  0.930  0.730  0.500  1.0
  O  O33  1  0.270  0.070  0.500  1.0
  O  O34  1  0.730  0.930  0.500  1.0
  O  O35  1  0.171  0.171  0.000  1.0
  O  O36  1  0.900  0.100  1.000  1.0
  O  O37  1  0.100  0.900  0.000  1.0
  O  O38  1  0.696  0.304  1.000  1.0
  O  O39  1  0.304  0.696  1.000  1.0
  O  O40  1  0.829  0.829  1.000  1.0
[/CIF]
.
The material described by Ba4Nb14O23 crystallizes in the orthorhombic Cmmm space group. Ba(1) is bonded to one O(2), one O(5), one O(7), one O(9), two equivalent O(1), two equivalent O(3), two equivalent O(4), and two equivalent O(6) atoms to form BaO12 cuboctahedra that share corners with five equivalent Ba(1)O12 cuboctahedra, corners with two equivalent Nb(2)O5 square pyramids, faces with four equivalent Ba(1)O12 cuboctahedra, faces with two equivalent Nb(1)O6 octahedra, faces with two equivalent Nb(2)O5 square pyramids, faces with two equivalent Nb(3)O5 square pyramids, and faces with two equivalent Nb(4)O5 square pyramids. There are seven inequivalent Nb sites. In the first Nb site, Nb(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form NbO6 octahedra that share corners with two equivalent Nb(1)O6 octahedra, corners with two equivalent Nb(3)O5 square pyramids, corners with two equivalent Nb(4)O5 square pyramids, and faces with eight equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedra are not tilted. In the second Nb site, Nb(2) is bonded to one O(6), two equivalent O(4), and two equivalent O(5) atoms to form NbO5 square pyramids that share corners with two equivalent Ba(1)O12 cuboctahedra,  a cornercorner with one Nb(3)O5 square pyramid, corners with two equivalent Nb(2)O5 square pyramids, corners with two equivalent Nb(4)O5 square pyramids,  an edgeedge with one Nb(2)O5 square pyramid, and faces with two equivalent Ba(1)O12 cuboctahedra. In the third Nb site, Nb(3) is bonded to one O(1), two equivalent O(6), and two equivalent O(7) atoms to form NbO5 square pyramids that share  a cornercorner with one Nb(1)O6 octahedra, corners with two equivalent Nb(2)O5 square pyramids, corners with two equivalent Nb(3)O5 square pyramids, and faces with four equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedra are not tilted. In the fourth Nb site, Nb(4) is bonded to one O(3), two equivalent O(4), and two equivalent O(9) atoms to form NbO5 square pyramids that share  a cornercorner with one Nb(1)O6 octahedra, corners with two equivalent Nb(4)O5 square pyramids, corners with four equivalent Nb(2)O5 square pyramids, and faces with four equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedra are not tilted. In the fifth Nb site, Nb(5) is bonded in a square co-planar geometry to one O(8), one O(9), and two equivalent O(5) atoms. In the sixth Nb site, Nb(6) is bonded in a rectangular see-saw-like geometry to two equivalent O(6) and two equivalent O(8) atoms. In the seventh Nb site, Nb(7) is bonded in a square co-planar geometry to two equivalent O(7) and two equivalent O(8) atoms. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to four equivalent Ba(1), one Nb(1), and one Nb(3) atom. In the second O site, O(2) is bonded in a distorted linear geometry to four equivalent Ba(1) and two equivalent Nb(1) atoms. In the third O site, O(3) is bonded in a distorted linear geometry to four equivalent Ba(1), one Nb(1), and one Nb(4) atom. In the fourth O site, O(4) is bonded to two equivalent Ba(1), one Nb(4), and two equivalent Nb(2) atoms to form a mixture of distorted corner, edge, and face-sharing OBa2Nb3 trigonal bipyramids. In the fifth O site, O(5) is bonded in a distorted rectangular see-saw-like geometry to one Ba(1), one Nb(5), and two equivalent Nb(2) atoms. In the sixth O site, O(6) is bonded to two equivalent Ba(1), one Nb(2), one Nb(3), and one Nb(6) atom to form a mixture of distorted corner, edge, and face-sharing OBa2Nb3 trigonal bipyramids. In the seventh O site, O(7) is bonded to two equivalent Ba(1), one Nb(7), and two equivalent Nb(3) atoms to form a mixture of distorted corner and edge-sharing OBa2Nb3 trigonal bipyramids. In the eighth O site, O(8) is bonded in a square co-planar geometry to one Nb(5), one Nb(7), and two equivalent Nb(6) atoms. In the ninth O site, O(9) is bonded to two equivalent Ba(1), one Nb(5), and two equivalent Nb(4) atoms to form a mixture of distorted corner and edge-sharing OBa2Nb3 trigonal bipyramids. is represented by the CIF file [CIF]
data_Ba4Nb14O23
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.237
_cell_length_b   12.237
_cell_length_c   4.186
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   118.229
_symmetry_Int_Tables_number   1
_cell_volume   552.192
_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
  Ba  Ba0  1  0.229  0.433  0.000  1.0
  Ba  Ba1  1  0.771  0.567  1.000  1.0
  Ba  Ba2  1  0.433  0.229  0.000  1.0
  Ba  Ba3  1  0.567  0.771  1.000  1.0
  Nb  Nb4  1  0.500  0.500  0.500  1.0
  Nb  Nb5  1  0.958  0.360  0.500  1.0
  Nb  Nb6  1  0.042  0.640  0.500  1.0
  Nb  Nb7  1  0.360  0.958  0.500  1.0
  Nb  Nb8  1  0.640  0.042  0.500  1.0
  Nb  Nb9  1  0.163  0.163  0.500  1.0
  Nb  Nb10  1  0.837  0.837  0.500  1.0
  Nb  Nb11  1  0.297  0.703  0.500  1.0
  Nb  Nb12  1  0.703  0.297  0.500  1.0
  Nb  Nb13  1  0.203  0.797  1.000  1.0
  Nb  Nb14  1  0.797  0.203  1.000  1.0
  Nb  Nb15  1  0.099  0.901  0.500  1.0
  Nb  Nb16  1  0.901  0.099  0.500  1.0
  Nb  Nb17  1  0.000  1.000  0.000  1.0
  O  O18  1  0.661  0.661  0.500  1.0
  O  O19  1  0.339  0.339  0.500  1.0
  O  O20  1  0.500  0.500  1.000  1.0
  O  O21  1  0.404  0.596  0.500  1.0
  O  O22  1  0.596  0.404  0.500  1.0
  O  O23  1  0.865  0.468  0.500  1.0
  O  O24  1  0.135  0.532  0.500  1.0
  O  O25  1  0.468  0.865  0.500  1.0
  O  O26  1  0.532  0.135  0.500  1.0
  O  O27  1  0.971  0.363  1.000  1.0
  O  O28  1  0.029  0.637  0.000  1.0
  O  O29  1  0.363  0.971  1.000  1.0
  O  O30  1  0.637  0.029  1.000  1.0
  O  O31  1  0.070  0.270  0.500  1.0
  O  O32  1  0.930  0.730  0.500  1.0
  O  O33  1  0.270  0.070  0.500  1.0
  O  O34  1  0.730  0.930  0.500  1.0
  O  O35  1  0.171  0.171  0.000  1.0
  O  O36  1  0.900  0.100  1.000  1.0
  O  O37  1  0.100  0.900  0.000  1.0
  O  O38  1  0.696  0.304  1.000  1.0
  O  O39  1  0.304  0.696  1.000  1.0
  O  O40  1  0.829  0.829  1.000  1.0
[/CIF]
.