The compound described by Nd2Co7 crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a 12-coordinate geometry to three equivalent Co(1) and nine equivalent Co(3) atoms. In the second Nd site, Nd(2) is bonded in a 18-coordinate geometry to three equivalent Co(4), three equivalent Co(5), six equivalent Co(2), and six equivalent Co(3) atoms. There are five inequivalent Co sites. In the first Co site, Co(5) is bonded in a 9-coordinate geometry to three equivalent Nd(2), three equivalent Co(2), and three equivalent Co(3) atoms. In the second Co site, Co(1) is bonded to six equivalent Nd(1) and six equivalent Co(3) atoms to form CoNd6Co6 cuboctahedra that share corners with twelve equivalent Co(3)Nd5Co7 cuboctahedra, edges with six equivalent Co(1)Nd6Co6 cuboctahedra, and faces with eighteen equivalent Co(3)Nd5Co7 cuboctahedra. In the third Co site, Co(2) is bonded to four equivalent Nd(2), two equivalent Co(4), two equivalent Co(5), and four equivalent Co(2) atoms to form CoNd4Co8 cuboctahedra that share corners with four equivalent Co(2)Nd4Co8 cuboctahedra, corners with twelve equivalent Co(3)Nd5Co7 cuboctahedra, edges with two equivalent Co(2)Nd4Co8 cuboctahedra, edges with eight equivalent Co(3)Nd5Co7 cuboctahedra, faces with two equivalent Co(3)Nd5Co7 cuboctahedra, and faces with eight equivalent Co(2)Nd4Co8 cuboctahedra. In the fourth Co site, Co(3) is bonded to two equivalent Nd(2), three equivalent Nd(1), one Co(1), one Co(4), one Co(5), and four equivalent Co(3) atoms to form distorted CoNd5Co7 cuboctahedra that share corners with two equivalent Co(1)Nd6Co6 cuboctahedra, corners with six equivalent Co(2)Nd4Co8 cuboctahedra, corners with nine equivalent Co(3)Nd5Co7 cuboctahedra, edges with four equivalent Co(2)Nd4Co8 cuboctahedra, edges with four equivalent Co(3)Nd5Co7 cuboctahedra,  a faceface with one Co(2)Nd4Co8 cuboctahedra, faces with three equivalent Co(1)Nd6Co6 cuboctahedra, and faces with ten equivalent Co(3)Nd5Co7 cuboctahedra. In the fifth Co site, Co(4) is bonded in a 9-coordinate geometry to three equivalent Nd(2), three equivalent Co(2), and three equivalent Co(3) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Nd2Co7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.056
_cell_length_b   5.056
_cell_length_c   24.480
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   541.857
_cell_formula_units_Z   4
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
  Nd  Nd0  1  0.333  0.667  0.472  1.0
  Nd  Nd1  1  0.667  0.333  0.528  1.0
  Nd  Nd2  1  0.667  0.333  0.972  1.0
  Nd  Nd3  1  0.333  0.667  0.028  1.0
  Nd  Nd4  1  0.333  0.667  0.327  1.0
  Nd  Nd5  1  0.667  0.333  0.673  1.0
  Nd  Nd6  1  0.667  0.333  0.827  1.0
  Nd  Nd7  1  0.333  0.667  0.173  1.0
  Co  Co8  1  0.000  0.000  0.500  1.0
  Co  Co9  1  0.000  0.000  0.000  1.0
  Co  Co10  1  0.833  0.167  0.250  1.0
  Co  Co11  1  0.833  0.667  0.250  1.0
  Co  Co12  1  0.333  0.167  0.250  1.0
  Co  Co13  1  0.167  0.833  0.750  1.0
  Co  Co14  1  0.167  0.333  0.750  1.0
  Co  Co15  1  0.667  0.833  0.750  1.0
  Co  Co16  1  0.834  0.166  0.411  1.0
  Co  Co17  1  0.834  0.669  0.411  1.0
  Co  Co18  1  0.331  0.166  0.411  1.0
  Co  Co19  1  0.166  0.834  0.589  1.0
  Co  Co20  1  0.166  0.331  0.589  1.0
  Co  Co21  1  0.669  0.834  0.589  1.0
  Co  Co22  1  0.166  0.834  0.911  1.0
  Co  Co23  1  0.166  0.331  0.911  1.0
  Co  Co24  1  0.669  0.834  0.911  1.0
  Co  Co25  1  0.834  0.166  0.089  1.0
  Co  Co26  1  0.834  0.669  0.089  1.0
  Co  Co27  1  0.331  0.166  0.089  1.0
  Co  Co28  1  0.000  0.000  0.332  1.0
  Co  Co29  1  0.000  0.000  0.668  1.0
  Co  Co30  1  0.000  0.000  0.832  1.0
  Co  Co31  1  0.000  0.000  0.168  1.0
  Co  Co32  1  0.333  0.667  0.668  1.0
  Co  Co33  1  0.667  0.333  0.332  1.0
  Co  Co34  1  0.667  0.333  0.168  1.0
  Co  Co35  1  0.333  0.667  0.832  1.0
[/CIF]
.
The compound described by Nd2Co7 crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a 12-coordinate geometry to three equivalent Co(1) and nine equivalent Co(3) atoms. In the second Nd site, Nd(2) is bonded in a 18-coordinate geometry to three equivalent Co(4), three equivalent Co(5), six equivalent Co(2), and six equivalent Co(3) atoms. There are five inequivalent Co sites. In the first Co site, Co(5) is bonded in a 9-coordinate geometry to three equivalent Nd(2), three equivalent Co(2), and three equivalent Co(3) atoms. In the second Co site, Co(1) is bonded to six equivalent Nd(1) and six equivalent Co(3) atoms to form CoNd6Co6 cuboctahedra that share corners with twelve equivalent Co(3)Nd5Co7 cuboctahedra, edges with six equivalent Co(1)Nd6Co6 cuboctahedra, and faces with eighteen equivalent Co(3)Nd5Co7 cuboctahedra. In the third Co site, Co(2) is bonded to four equivalent Nd(2), two equivalent Co(4), two equivalent Co(5), and four equivalent Co(2) atoms to form CoNd4Co8 cuboctahedra that share corners with four equivalent Co(2)Nd4Co8 cuboctahedra, corners with twelve equivalent Co(3)Nd5Co7 cuboctahedra, edges with two equivalent Co(2)Nd4Co8 cuboctahedra, edges with eight equivalent Co(3)Nd5Co7 cuboctahedra, faces with two equivalent Co(3)Nd5Co7 cuboctahedra, and faces with eight equivalent Co(2)Nd4Co8 cuboctahedra. In the fourth Co site, Co(3) is bonded to two equivalent Nd(2), three equivalent Nd(1), one Co(1), one Co(4), one Co(5), and four equivalent Co(3) atoms to form distorted CoNd5Co7 cuboctahedra that share corners with two equivalent Co(1)Nd6Co6 cuboctahedra, corners with six equivalent Co(2)Nd4Co8 cuboctahedra, corners with nine equivalent Co(3)Nd5Co7 cuboctahedra, edges with four equivalent Co(2)Nd4Co8 cuboctahedra, edges with four equivalent Co(3)Nd5Co7 cuboctahedra,  a faceface with one Co(2)Nd4Co8 cuboctahedra, faces with three equivalent Co(1)Nd6Co6 cuboctahedra, and faces with ten equivalent Co(3)Nd5Co7 cuboctahedra. In the fifth Co site, Co(4) is bonded in a 9-coordinate geometry to three equivalent Nd(2), three equivalent Co(2), and three equivalent Co(3) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Nd2Co7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.056
_cell_length_b   5.056
_cell_length_c   24.480
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   541.857
_cell_formula_units_Z   4
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
  Nd  Nd0  1  0.333  0.667  0.472  1.0
  Nd  Nd1  1  0.667  0.333  0.528  1.0
  Nd  Nd2  1  0.667  0.333  0.972  1.0
  Nd  Nd3  1  0.333  0.667  0.028  1.0
  Nd  Nd4  1  0.333  0.667  0.327  1.0
  Nd  Nd5  1  0.667  0.333  0.673  1.0
  Nd  Nd6  1  0.667  0.333  0.827  1.0
  Nd  Nd7  1  0.333  0.667  0.173  1.0
  Co  Co8  1  0.000  0.000  0.500  1.0
  Co  Co9  1  0.000  0.000  0.000  1.0
  Co  Co10  1  0.833  0.167  0.250  1.0
  Co  Co11  1  0.833  0.667  0.250  1.0
  Co  Co12  1  0.333  0.167  0.250  1.0
  Co  Co13  1  0.167  0.833  0.750  1.0
  Co  Co14  1  0.167  0.333  0.750  1.0
  Co  Co15  1  0.667  0.833  0.750  1.0
  Co  Co16  1  0.834  0.166  0.411  1.0
  Co  Co17  1  0.834  0.669  0.411  1.0
  Co  Co18  1  0.331  0.166  0.411  1.0
  Co  Co19  1  0.166  0.834  0.589  1.0
  Co  Co20  1  0.166  0.331  0.589  1.0
  Co  Co21  1  0.669  0.834  0.589  1.0
  Co  Co22  1  0.166  0.834  0.911  1.0
  Co  Co23  1  0.166  0.331  0.911  1.0
  Co  Co24  1  0.669  0.834  0.911  1.0
  Co  Co25  1  0.834  0.166  0.089  1.0
  Co  Co26  1  0.834  0.669  0.089  1.0
  Co  Co27  1  0.331  0.166  0.089  1.0
  Co  Co28  1  0.000  0.000  0.332  1.0
  Co  Co29  1  0.000  0.000  0.668  1.0
  Co  Co30  1  0.000  0.000  0.832  1.0
  Co  Co31  1  0.000  0.000  0.168  1.0
  Co  Co32  1  0.333  0.667  0.668  1.0
  Co  Co33  1  0.667  0.333  0.332  1.0
  Co  Co34  1  0.667  0.333  0.168  1.0
  Co  Co35  1  0.333  0.667  0.832  1.0
[/CIF]
.