The structure described by Co7Nb6 crystallizes in the trigonal R-3m space group. There are three inequivalent Nb sites. In the first Nb site, Nb(1) is bonded in a 10-coordinate geometry to three equivalent Nb(3), four equivalent Nb(2), and three equivalent Co(1) atoms. In the second Nb site, Nb(2) is bonded in a 10-coordinate geometry to three equivalent Nb(3), four equivalent Nb(1), and three equivalent Co(1) atoms. In the third Nb site, Nb(3) is bonded in a 13-coordinate geometry to one Nb(3), three equivalent Nb(1), three equivalent Nb(2), and six equivalent Co(1) atoms. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a 9-coordinate geometry to one Nb(1), one Nb(2), two equivalent Nb(3), one Co(2), and four equivalent Co(1) atoms. In the second Co site, Co(2) is bonded in a 6-coordinate geometry to six equivalent Co(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Nb6Co7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.782
_cell_length_b   10.782
_cell_length_c   10.782
_cell_angle_alpha   26.633
_cell_angle_beta   26.633
_cell_angle_gamma   26.633
_symmetry_Int_Tables_number   1
_cell_volume   222.055
_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
  Nb  Nb0  1  0.203  0.203  0.203  1.0
  Nb  Nb1  1  0.116  0.116  0.116  1.0
  Nb  Nb2  1  0.554  0.554  0.554  1.0
  Nb  Nb3  1  0.797  0.797  0.797  1.0
  Nb  Nb4  1  0.446  0.446  0.446  1.0
  Nb  Nb5  1  0.884  0.884  0.884  1.0
  Co  Co6  1  0.592  0.123  0.123  1.0
  Co  Co7  1  0.123  0.123  0.592  1.0
  Co  Co8  1  0.877  0.877  0.408  1.0
  Co  Co9  1  0.877  0.408  0.877  1.0
  Co  Co10  1  0.000  0.000  0.000  1.0
  Co  Co11  1  0.123  0.592  0.123  1.0
  Co  Co12  1  0.408  0.877  0.877  1.0
[/CIF]
.
The structure described by Co7Nb6 crystallizes in the trigonal R-3m space group. There are three inequivalent Nb sites. In the first Nb site, Nb(1) is bonded in a 10-coordinate geometry to three equivalent Nb(3), four equivalent Nb(2), and three equivalent Co(1) atoms. In the second Nb site, Nb(2) is bonded in a 10-coordinate geometry to three equivalent Nb(3), four equivalent Nb(1), and three equivalent Co(1) atoms. In the third Nb site, Nb(3) is bonded in a 13-coordinate geometry to one Nb(3), three equivalent Nb(1), three equivalent Nb(2), and six equivalent Co(1) atoms. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a 9-coordinate geometry to one Nb(1), one Nb(2), two equivalent Nb(3), one Co(2), and four equivalent Co(1) atoms. In the second Co site, Co(2) is bonded in a 6-coordinate geometry to six equivalent Co(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Nb6Co7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.782
_cell_length_b   10.782
_cell_length_c   10.782
_cell_angle_alpha   26.633
_cell_angle_beta   26.633
_cell_angle_gamma   26.633
_symmetry_Int_Tables_number   1
_cell_volume   222.055
_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
  Nb  Nb0  1  0.203  0.203  0.203  1.0
  Nb  Nb1  1  0.116  0.116  0.116  1.0
  Nb  Nb2  1  0.554  0.554  0.554  1.0
  Nb  Nb3  1  0.797  0.797  0.797  1.0
  Nb  Nb4  1  0.446  0.446  0.446  1.0
  Nb  Nb5  1  0.884  0.884  0.884  1.0
  Co  Co6  1  0.592  0.123  0.123  1.0
  Co  Co7  1  0.123  0.123  0.592  1.0
  Co  Co8  1  0.877  0.877  0.408  1.0
  Co  Co9  1  0.877  0.408  0.877  1.0
  Co  Co10  1  0.000  0.000  0.000  1.0
  Co  Co11  1  0.123  0.592  0.123  1.0
  Co  Co12  1  0.408  0.877  0.877  1.0
[/CIF]
.