The structure described by Nb is beta Plutonium-like structured and crystallizes in the triclinic P1 space group. There are twelve inequivalent Nb sites. In the first Nb site, Nb(1) is bonded in a 13-coordinate geometry to one Nb(10), one Nb(12), one Nb(3), one Nb(4), one Nb(5), one Nb(6), one Nb(7), one Nb(8), one Nb(9), two equivalent Nb(11), and two equivalent Nb(2) atoms. In the second Nb site, Nb(2) is bonded in a 1-coordinate geometry to one Nb(10), one Nb(11), one Nb(3), one Nb(5), one Nb(6), one Nb(7), one Nb(8), one Nb(9), two equivalent Nb(1), and two equivalent Nb(4) atoms. In the third Nb site, Nb(3) is bonded in a 14-coordinate geometry to one Nb(1), one Nb(11), one Nb(12), one Nb(2), one Nb(4), one Nb(5), one Nb(8), one Nb(9), two equivalent Nb(10), two equivalent Nb(6), and two equivalent Nb(7) atoms. In the fourth Nb site, Nb(4) is bonded in a 14-coordinate geometry to one Nb(1), one Nb(11), one Nb(12), one Nb(3), one Nb(5), one Nb(6), one Nb(8), one Nb(9), two equivalent Nb(10), two equivalent Nb(2), and two equivalent Nb(7) atoms. In the fifth Nb site, Nb(5) is bonded in a 13-coordinate geometry to one Nb(1), one Nb(10), one Nb(11), one Nb(2), one Nb(3), one Nb(4), one Nb(7), one Nb(8), one Nb(9), two equivalent Nb(12), and two equivalent Nb(6) atoms. In the sixth Nb site, Nb(6) is bonded in a 11-coordinate geometry to one Nb(1), one Nb(12), one Nb(2), one Nb(4), one Nb(7), one Nb(8), one Nb(9), two equivalent Nb(3), and two equivalent Nb(5) atoms. In the seventh Nb site, Nb(7) is bonded in a 13-coordinate geometry to one Nb(1), one Nb(10), one Nb(2), one Nb(5), one Nb(6), one Nb(8), one Nb(9), two equivalent Nb(12), two equivalent Nb(3), and two equivalent Nb(4) atoms. In the eighth Nb site, Nb(8) is bonded to one Nb(1), one Nb(10), one Nb(11), one Nb(12), one Nb(2), one Nb(3), one Nb(4), one Nb(5), one Nb(6), one Nb(7), and two equivalent Nb(9) atoms to form a mixture of face and corner-sharing NbNb12 cuboctahedra. In the ninth Nb site, Nb(9) is bonded to one Nb(1), one Nb(10), one Nb(11), one Nb(12), one Nb(2), one Nb(3), one Nb(4), one Nb(5), one Nb(6), one Nb(7), and two equivalent Nb(8) atoms to form a mixture of face and corner-sharing NbNb12 cuboctahedra. In the tenth Nb site, Nb(10) is bonded in a 10-coordinate geometry to one Nb(1), one Nb(2), one Nb(5), one Nb(7), one Nb(8), one Nb(9), two equivalent Nb(11), two equivalent Nb(3), and two equivalent Nb(4) atoms. In the eleventh Nb site, Nb(11) is bonded in a 10-coordinate geometry to one Nb(12), one Nb(2), one Nb(3), one Nb(4), one Nb(5), one Nb(8), one Nb(9), two equivalent Nb(1), and two equivalent Nb(10) atoms. In the twelfth Nb site, Nb(12) is bonded in a 10-coordinate geometry to one Nb(1), one Nb(11), one Nb(3), one Nb(4), one Nb(6), one Nb(8), one Nb(9), two equivalent Nb(5), and two equivalent Nb(7) atoms. is represented by the CIF file [CIF]
data_Nb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.374
_cell_length_b   6.938
_cell_length_c   7.180
_cell_angle_alpha   107.497
_cell_angle_beta   108.620
_cell_angle_gamma   102.625
_symmetry_Int_Tables_number   1
_cell_volume   226.840
_cell_formula_units_Z   12
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
  Nb  Nb0  1  0.069  0.140  0.503  1.0
  Nb  Nb1  1  0.510  0.213  0.341  1.0
  Nb  Nb2  1  0.073  0.731  0.134  1.0
  Nb  Nb3  1  0.046  0.406  0.262  1.0
  Nb  Nb4  1  0.024  0.984  0.882  1.0
  Nb  Nb5  1  0.596  0.926  0.050  1.0
  Nb  Nb6  1  0.684  0.720  0.394  1.0
  Nb  Nb7  1  0.055  0.564  0.698  1.0
  Nb  Nb8  1  0.553  0.564  0.699  1.0
  Nb  Nb9  1  0.428  0.395  0.998  1.0
  Nb  Nb10  1  0.771  0.251  0.789  1.0
  Nb  Nb11  1  0.337  0.880  0.604  1.0
[/CIF]
.
The structure described by Nb is beta Plutonium-like structured and crystallizes in the triclinic P1 space group. There are twelve inequivalent Nb sites. In the first Nb site, Nb(1) is bonded in a 13-coordinate geometry to one Nb(10), one Nb(12), one Nb(3), one Nb(4), one Nb(5), one Nb(6), one Nb(7), one Nb(8), one Nb(9), two equivalent Nb(11), and two equivalent Nb(2) atoms. In the second Nb site, Nb(2) is bonded in a 1-coordinate geometry to one Nb(10), one Nb(11), one Nb(3), one Nb(5), one Nb(6), one Nb(7), one Nb(8), one Nb(9), two equivalent Nb(1), and two equivalent Nb(4) atoms. In the third Nb site, Nb(3) is bonded in a 14-coordinate geometry to one Nb(1), one Nb(11), one Nb(12), one Nb(2), one Nb(4), one Nb(5), one Nb(8), one Nb(9), two equivalent Nb(10), two equivalent Nb(6), and two equivalent Nb(7) atoms. In the fourth Nb site, Nb(4) is bonded in a 14-coordinate geometry to one Nb(1), one Nb(11), one Nb(12), one Nb(3), one Nb(5), one Nb(6), one Nb(8), one Nb(9), two equivalent Nb(10), two equivalent Nb(2), and two equivalent Nb(7) atoms. In the fifth Nb site, Nb(5) is bonded in a 13-coordinate geometry to one Nb(1), one Nb(10), one Nb(11), one Nb(2), one Nb(3), one Nb(4), one Nb(7), one Nb(8), one Nb(9), two equivalent Nb(12), and two equivalent Nb(6) atoms. In the sixth Nb site, Nb(6) is bonded in a 11-coordinate geometry to one Nb(1), one Nb(12), one Nb(2), one Nb(4), one Nb(7), one Nb(8), one Nb(9), two equivalent Nb(3), and two equivalent Nb(5) atoms. In the seventh Nb site, Nb(7) is bonded in a 13-coordinate geometry to one Nb(1), one Nb(10), one Nb(2), one Nb(5), one Nb(6), one Nb(8), one Nb(9), two equivalent Nb(12), two equivalent Nb(3), and two equivalent Nb(4) atoms. In the eighth Nb site, Nb(8) is bonded to one Nb(1), one Nb(10), one Nb(11), one Nb(12), one Nb(2), one Nb(3), one Nb(4), one Nb(5), one Nb(6), one Nb(7), and two equivalent Nb(9) atoms to form a mixture of face and corner-sharing NbNb12 cuboctahedra. In the ninth Nb site, Nb(9) is bonded to one Nb(1), one Nb(10), one Nb(11), one Nb(12), one Nb(2), one Nb(3), one Nb(4), one Nb(5), one Nb(6), one Nb(7), and two equivalent Nb(8) atoms to form a mixture of face and corner-sharing NbNb12 cuboctahedra. In the tenth Nb site, Nb(10) is bonded in a 10-coordinate geometry to one Nb(1), one Nb(2), one Nb(5), one Nb(7), one Nb(8), one Nb(9), two equivalent Nb(11), two equivalent Nb(3), and two equivalent Nb(4) atoms. In the eleventh Nb site, Nb(11) is bonded in a 10-coordinate geometry to one Nb(12), one Nb(2), one Nb(3), one Nb(4), one Nb(5), one Nb(8), one Nb(9), two equivalent Nb(1), and two equivalent Nb(10) atoms. In the twelfth Nb site, Nb(12) is bonded in a 10-coordinate geometry to one Nb(1), one Nb(11), one Nb(3), one Nb(4), one Nb(6), one Nb(8), one Nb(9), two equivalent Nb(5), and two equivalent Nb(7) atoms. is represented by the CIF file [CIF]
data_Nb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.374
_cell_length_b   6.938
_cell_length_c   7.180
_cell_angle_alpha   107.497
_cell_angle_beta   108.620
_cell_angle_gamma   102.625
_symmetry_Int_Tables_number   1
_cell_volume   226.840
_cell_formula_units_Z   12
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
  Nb  Nb0  1  0.069  0.140  0.503  1.0
  Nb  Nb1  1  0.510  0.213  0.341  1.0
  Nb  Nb2  1  0.073  0.731  0.134  1.0
  Nb  Nb3  1  0.046  0.406  0.262  1.0
  Nb  Nb4  1  0.024  0.984  0.882  1.0
  Nb  Nb5  1  0.596  0.926  0.050  1.0
  Nb  Nb6  1  0.684  0.720  0.394  1.0
  Nb  Nb7  1  0.055  0.564  0.698  1.0
  Nb  Nb8  1  0.553  0.564  0.699  1.0
  Nb  Nb9  1  0.428  0.395  0.998  1.0
  Nb  Nb10  1  0.771  0.251  0.789  1.0
  Nb  Nb11  1  0.337  0.880  0.604  1.0
[/CIF]
.