The structure described by YbPrCo17 crystallizes in the hexagonal P6_3/mmc space group. Yb(1) is bonded in a 18-coordinate geometry to six equivalent Co(4) and twelve equivalent Co(2) atoms. Pr(1) is bonded in a 20-coordinate geometry to two equivalent Co(1), six equivalent Co(2), six equivalent Co(3), and six equivalent Co(4) atoms. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded in a 14-coordinate geometry to one Pr(1), one Co(1), three equivalent Co(2), three equivalent Co(3), and six equivalent Co(4) atoms. In the second Co site, Co(2) is bonded to two equivalent Yb(1), one Pr(1), one Co(1), two equivalent Co(2), two equivalent Co(3), and four equivalent Co(4) atoms to form distorted CoYb2PrCo9 cuboctahedra that share corners with five equivalent Co(3)Pr2Co10 cuboctahedra, corners with eight equivalent Co(4)YbPrCo10 cuboctahedra, corners with ten equivalent Co(2)Yb2PrCo9 cuboctahedra, edges with two equivalent Co(4)YbPrCo10 cuboctahedra, edges with three equivalent Co(3)Pr2Co10 cuboctahedra, edges with five equivalent Co(2)Yb2PrCo9 cuboctahedra, faces with two equivalent Co(3)Pr2Co10 cuboctahedra, faces with eight equivalent Co(2)Yb2PrCo9 cuboctahedra, and faces with ten equivalent Co(4)YbPrCo10 cuboctahedra. In the third Co site, Co(3) is bonded to two equivalent Pr(1), two equivalent Co(1), four equivalent Co(2), and four equivalent Co(4) atoms to form CoPr2Co10 cuboctahedra that share corners with four equivalent Co(3)Pr2Co10 cuboctahedra, corners with eight equivalent Co(4)YbPrCo10 cuboctahedra, corners with ten equivalent Co(2)Yb2PrCo9 cuboctahedra, edges with four equivalent Co(4)YbPrCo10 cuboctahedra, edges with six equivalent Co(2)Yb2PrCo9 cuboctahedra, faces with four equivalent Co(2)Yb2PrCo9 cuboctahedra, faces with six equivalent Co(3)Pr2Co10 cuboctahedra, and faces with eight equivalent Co(4)YbPrCo10 cuboctahedra. In the fourth Co site, Co(4) is bonded to one Yb(1), one Pr(1), two equivalent Co(1), two equivalent Co(3), two equivalent Co(4), and four equivalent Co(2) atoms to form distorted CoYbPrCo10 cuboctahedra that share corners with four equivalent Co(3)Pr2Co10 cuboctahedra, corners with eight equivalent Co(2)Yb2PrCo9 cuboctahedra, corners with twelve equivalent Co(4)YbPrCo10 cuboctahedra,  an edgeedge with one Co(4)YbPrCo10 cuboctahedra, edges with two equivalent Co(3)Pr2Co10 cuboctahedra, edges with two equivalent Co(2)Yb2PrCo9 cuboctahedra, faces with four equivalent Co(3)Pr2Co10 cuboctahedra, faces with seven equivalent Co(4)YbPrCo10 cuboctahedra, and faces with ten equivalent Co(2)Yb2PrCo9 cuboctahedra. is represented by the CIF file [CIF]
data_YbPrCo17
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.170
_cell_length_b   8.334
_cell_length_c   8.334
_cell_angle_alpha   120.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   491.394
_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
  Yb  Yb0  1  0.750  0.000  1.000  1.0
  Yb  Yb1  1  0.250  1.000  0.000  1.0
  Pr  Pr2  1  0.250  0.667  0.333  1.0
  Pr  Pr3  1  0.750  0.333  0.667  1.0
  Co  Co4  1  0.608  0.667  0.333  1.0
  Co  Co5  1  0.392  0.333  0.667  1.0
  Co  Co6  1  0.108  0.333  0.667  1.0
  Co  Co7  1  0.892  0.667  0.333  1.0
  Co  Co8  1  0.482  0.835  0.670  1.0
  Co  Co9  1  0.482  0.835  0.165  1.0
  Co  Co10  1  0.482  0.330  0.165  1.0
  Co  Co11  1  0.518  0.165  0.330  1.0
  Co  Co12  1  0.518  0.165  0.835  1.0
  Co  Co13  1  0.518  0.670  0.835  1.0
  Co  Co14  1  0.982  0.165  0.330  1.0
  Co  Co15  1  0.982  0.165  0.835  1.0
  Co  Co16  1  0.982  0.670  0.835  1.0
  Co  Co17  1  0.018  0.835  0.670  1.0
  Co  Co18  1  0.018  0.835  0.165  1.0
  Co  Co19  1  0.018  0.330  0.165  1.0
  Co  Co20  1  0.500  0.500  0.000  1.0
  Co  Co21  1  0.500  0.500  0.500  1.0
  Co  Co22  1  0.500  0.000  0.500  1.0
  Co  Co23  1  0.000  0.500  0.000  1.0
  Co  Co24  1  0.000  0.500  0.500  1.0
  Co  Co25  1  0.000  0.000  0.500  1.0
  Co  Co26  1  0.750  0.672  0.050  1.0
  Co  Co27  1  0.750  0.378  0.328  1.0
  Co  Co28  1  0.750  0.950  0.622  1.0
  Co  Co29  1  0.750  0.378  0.050  1.0
  Co  Co30  1  0.750  0.950  0.328  1.0
  Co  Co31  1  0.750  0.672  0.622  1.0
  Co  Co32  1  0.250  0.328  0.950  1.0
  Co  Co33  1  0.250  0.622  0.672  1.0
  Co  Co34  1  0.250  0.050  0.378  1.0
  Co  Co35  1  0.250  0.622  0.950  1.0
  Co  Co36  1  0.250  0.050  0.672  1.0
  Co  Co37  1  0.250  0.328  0.378  1.0
[/CIF]
.
The structure described by YbPrCo17 crystallizes in the hexagonal P6_3/mmc space group. Yb(1) is bonded in a 18-coordinate geometry to six equivalent Co(4) and twelve equivalent Co(2) atoms. Pr(1) is bonded in a 20-coordinate geometry to two equivalent Co(1), six equivalent Co(2), six equivalent Co(3), and six equivalent Co(4) atoms. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded in a 14-coordinate geometry to one Pr(1), one Co(1), three equivalent Co(2), three equivalent Co(3), and six equivalent Co(4) atoms. In the second Co site, Co(2) is bonded to two equivalent Yb(1), one Pr(1), one Co(1), two equivalent Co(2), two equivalent Co(3), and four equivalent Co(4) atoms to form distorted CoYb2PrCo9 cuboctahedra that share corners with five equivalent Co(3)Pr2Co10 cuboctahedra, corners with eight equivalent Co(4)YbPrCo10 cuboctahedra, corners with ten equivalent Co(2)Yb2PrCo9 cuboctahedra, edges with two equivalent Co(4)YbPrCo10 cuboctahedra, edges with three equivalent Co(3)Pr2Co10 cuboctahedra, edges with five equivalent Co(2)Yb2PrCo9 cuboctahedra, faces with two equivalent Co(3)Pr2Co10 cuboctahedra, faces with eight equivalent Co(2)Yb2PrCo9 cuboctahedra, and faces with ten equivalent Co(4)YbPrCo10 cuboctahedra. In the third Co site, Co(3) is bonded to two equivalent Pr(1), two equivalent Co(1), four equivalent Co(2), and four equivalent Co(4) atoms to form CoPr2Co10 cuboctahedra that share corners with four equivalent Co(3)Pr2Co10 cuboctahedra, corners with eight equivalent Co(4)YbPrCo10 cuboctahedra, corners with ten equivalent Co(2)Yb2PrCo9 cuboctahedra, edges with four equivalent Co(4)YbPrCo10 cuboctahedra, edges with six equivalent Co(2)Yb2PrCo9 cuboctahedra, faces with four equivalent Co(2)Yb2PrCo9 cuboctahedra, faces with six equivalent Co(3)Pr2Co10 cuboctahedra, and faces with eight equivalent Co(4)YbPrCo10 cuboctahedra. In the fourth Co site, Co(4) is bonded to one Yb(1), one Pr(1), two equivalent Co(1), two equivalent Co(3), two equivalent Co(4), and four equivalent Co(2) atoms to form distorted CoYbPrCo10 cuboctahedra that share corners with four equivalent Co(3)Pr2Co10 cuboctahedra, corners with eight equivalent Co(2)Yb2PrCo9 cuboctahedra, corners with twelve equivalent Co(4)YbPrCo10 cuboctahedra,  an edgeedge with one Co(4)YbPrCo10 cuboctahedra, edges with two equivalent Co(3)Pr2Co10 cuboctahedra, edges with two equivalent Co(2)Yb2PrCo9 cuboctahedra, faces with four equivalent Co(3)Pr2Co10 cuboctahedra, faces with seven equivalent Co(4)YbPrCo10 cuboctahedra, and faces with ten equivalent Co(2)Yb2PrCo9 cuboctahedra. is represented by the CIF file [CIF]
data_YbPrCo17
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.170
_cell_length_b   8.334
_cell_length_c   8.334
_cell_angle_alpha   120.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   491.394
_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
  Yb  Yb0  1  0.750  0.000  1.000  1.0
  Yb  Yb1  1  0.250  1.000  0.000  1.0
  Pr  Pr2  1  0.250  0.667  0.333  1.0
  Pr  Pr3  1  0.750  0.333  0.667  1.0
  Co  Co4  1  0.608  0.667  0.333  1.0
  Co  Co5  1  0.392  0.333  0.667  1.0
  Co  Co6  1  0.108  0.333  0.667  1.0
  Co  Co7  1  0.892  0.667  0.333  1.0
  Co  Co8  1  0.482  0.835  0.670  1.0
  Co  Co9  1  0.482  0.835  0.165  1.0
  Co  Co10  1  0.482  0.330  0.165  1.0
  Co  Co11  1  0.518  0.165  0.330  1.0
  Co  Co12  1  0.518  0.165  0.835  1.0
  Co  Co13  1  0.518  0.670  0.835  1.0
  Co  Co14  1  0.982  0.165  0.330  1.0
  Co  Co15  1  0.982  0.165  0.835  1.0
  Co  Co16  1  0.982  0.670  0.835  1.0
  Co  Co17  1  0.018  0.835  0.670  1.0
  Co  Co18  1  0.018  0.835  0.165  1.0
  Co  Co19  1  0.018  0.330  0.165  1.0
  Co  Co20  1  0.500  0.500  0.000  1.0
  Co  Co21  1  0.500  0.500  0.500  1.0
  Co  Co22  1  0.500  0.000  0.500  1.0
  Co  Co23  1  0.000  0.500  0.000  1.0
  Co  Co24  1  0.000  0.500  0.500  1.0
  Co  Co25  1  0.000  0.000  0.500  1.0
  Co  Co26  1  0.750  0.672  0.050  1.0
  Co  Co27  1  0.750  0.378  0.328  1.0
  Co  Co28  1  0.750  0.950  0.622  1.0
  Co  Co29  1  0.750  0.378  0.050  1.0
  Co  Co30  1  0.750  0.950  0.328  1.0
  Co  Co31  1  0.750  0.672  0.622  1.0
  Co  Co32  1  0.250  0.328  0.950  1.0
  Co  Co33  1  0.250  0.622  0.672  1.0
  Co  Co34  1  0.250  0.050  0.378  1.0
  Co  Co35  1  0.250  0.622  0.950  1.0
  Co  Co36  1  0.250  0.050  0.672  1.0
  Co  Co37  1  0.250  0.328  0.378  1.0
[/CIF]
.