The compound described by Dy2Co17 crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded in a 20-coordinate geometry to two equivalent Co(3), six equivalent Co(1), six equivalent Co(2), and six equivalent Co(4) atoms. In the second Dy site, Dy(2) is bonded in a 18-coordinate geometry to six equivalent Co(1) and twelve equivalent Co(4) atoms. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded to one Dy(1), one Dy(2), two equivalent Co(1), two equivalent Co(2), two equivalent Co(3), and four equivalent Co(4) atoms to form distorted CoDy2Co10 cuboctahedra that share corners with four equivalent Co(2)Dy2Co10 cuboctahedra, corners with eight equivalent Co(4)Dy3Co9 cuboctahedra, corners with twelve equivalent Co(1)Dy2Co10 cuboctahedra,  an edgeedge with one Co(1)Dy2Co10 cuboctahedra, edges with two equivalent Co(2)Dy2Co10 cuboctahedra, edges with two equivalent Co(4)Dy3Co9 cuboctahedra, faces with four equivalent Co(2)Dy2Co10 cuboctahedra, faces with seven equivalent Co(1)Dy2Co10 cuboctahedra, and faces with ten equivalent Co(4)Dy3Co9 cuboctahedra. In the second Co site, Co(2) is bonded to two equivalent Dy(1), two equivalent Co(3), four equivalent Co(1), and four equivalent Co(4) atoms to form CoDy2Co10 cuboctahedra that share corners with four equivalent Co(2)Dy2Co10 cuboctahedra, corners with eight equivalent Co(1)Dy2Co10 cuboctahedra, corners with ten equivalent Co(4)Dy3Co9 cuboctahedra, edges with four equivalent Co(1)Dy2Co10 cuboctahedra, edges with six equivalent Co(4)Dy3Co9 cuboctahedra, faces with four equivalent Co(4)Dy3Co9 cuboctahedra, faces with six equivalent Co(2)Dy2Co10 cuboctahedra, and faces with eight equivalent Co(1)Dy2Co10 cuboctahedra. In the third Co site, Co(3) is bonded in a 14-coordinate geometry to one Dy(1), one Co(3), three equivalent Co(2), three equivalent Co(4), and six equivalent Co(1) atoms. In the fourth Co site, Co(4) is bonded to one Dy(1), two equivalent Dy(2), one Co(3), two equivalent Co(2), two equivalent Co(4), and four equivalent Co(1) atoms to form distorted CoDy3Co9 cuboctahedra that share corners with five equivalent Co(2)Dy2Co10 cuboctahedra, corners with eight equivalent Co(1)Dy2Co10 cuboctahedra, corners with ten equivalent Co(4)Dy3Co9 cuboctahedra, edges with two equivalent Co(1)Dy2Co10 cuboctahedra, edges with three equivalent Co(2)Dy2Co10 cuboctahedra, edges with five equivalent Co(4)Dy3Co9 cuboctahedra, faces with two equivalent Co(2)Dy2Co10 cuboctahedra, faces with eight equivalent Co(4)Dy3Co9 cuboctahedra, and faces with ten equivalent Co(1)Dy2Co10 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Dy2Co17
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.300
_cell_length_b   8.300
_cell_length_c   8.105
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   483.539
_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
  Dy  Dy0  1  0.333  0.667  0.750  1.0
  Dy  Dy1  1  0.000  0.000  0.250  1.0
  Dy  Dy2  1  0.667  0.333  0.250  1.0
  Dy  Dy3  1  0.000  0.000  0.750  1.0
  Co  Co4  1  0.624  0.953  0.250  1.0
  Co  Co5  1  0.671  0.624  0.750  1.0
  Co  Co6  1  0.500  0.000  0.000  1.0
  Co  Co7  1  0.667  0.333  0.607  1.0
  Co  Co8  1  0.329  0.376  0.250  1.0
  Co  Co9  1  0.167  0.334  0.520  1.0
  Co  Co10  1  0.334  0.167  0.020  1.0
  Co  Co11  1  0.833  0.666  0.480  1.0
  Co  Co12  1  0.047  0.376  0.250  1.0
  Co  Co13  1  0.329  0.953  0.250  1.0
  Co  Co14  1  0.047  0.671  0.250  1.0
  Co  Co15  1  0.833  0.167  0.020  1.0
  Co  Co16  1  0.333  0.667  0.393  1.0
  Co  Co17  1  0.624  0.671  0.250  1.0
  Co  Co18  1  0.666  0.833  0.980  1.0
  Co  Co19  1  0.167  0.833  0.980  1.0
  Co  Co20  1  0.167  0.833  0.520  1.0
  Co  Co21  1  0.666  0.833  0.520  1.0
  Co  Co22  1  0.333  0.667  0.107  1.0
  Co  Co23  1  0.500  0.000  0.500  1.0
  Co  Co24  1  0.376  0.329  0.750  1.0
  Co  Co25  1  0.500  0.500  0.000  1.0
  Co  Co26  1  0.671  0.047  0.750  1.0
  Co  Co27  1  0.376  0.047  0.750  1.0
  Co  Co28  1  0.167  0.334  0.980  1.0
  Co  Co29  1  0.667  0.333  0.893  1.0
  Co  Co30  1  0.833  0.167  0.480  1.0
  Co  Co31  1  0.833  0.666  0.020  1.0
  Co  Co32  1  0.000  0.500  0.000  1.0
  Co  Co33  1  0.953  0.329  0.750  1.0
  Co  Co34  1  0.953  0.624  0.750  1.0
  Co  Co35  1  0.000  0.500  0.500  1.0
  Co  Co36  1  0.334  0.167  0.480  1.0
  Co  Co37  1  0.500  0.500  0.500  1.0
[/CIF]
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The compound described by Dy2Co17 crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded in a 20-coordinate geometry to two equivalent Co(3), six equivalent Co(1), six equivalent Co(2), and six equivalent Co(4) atoms. In the second Dy site, Dy(2) is bonded in a 18-coordinate geometry to six equivalent Co(1) and twelve equivalent Co(4) atoms. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded to one Dy(1), one Dy(2), two equivalent Co(1), two equivalent Co(2), two equivalent Co(3), and four equivalent Co(4) atoms to form distorted CoDy2Co10 cuboctahedra that share corners with four equivalent Co(2)Dy2Co10 cuboctahedra, corners with eight equivalent Co(4)Dy3Co9 cuboctahedra, corners with twelve equivalent Co(1)Dy2Co10 cuboctahedra,  an edgeedge with one Co(1)Dy2Co10 cuboctahedra, edges with two equivalent Co(2)Dy2Co10 cuboctahedra, edges with two equivalent Co(4)Dy3Co9 cuboctahedra, faces with four equivalent Co(2)Dy2Co10 cuboctahedra, faces with seven equivalent Co(1)Dy2Co10 cuboctahedra, and faces with ten equivalent Co(4)Dy3Co9 cuboctahedra. In the second Co site, Co(2) is bonded to two equivalent Dy(1), two equivalent Co(3), four equivalent Co(1), and four equivalent Co(4) atoms to form CoDy2Co10 cuboctahedra that share corners with four equivalent Co(2)Dy2Co10 cuboctahedra, corners with eight equivalent Co(1)Dy2Co10 cuboctahedra, corners with ten equivalent Co(4)Dy3Co9 cuboctahedra, edges with four equivalent Co(1)Dy2Co10 cuboctahedra, edges with six equivalent Co(4)Dy3Co9 cuboctahedra, faces with four equivalent Co(4)Dy3Co9 cuboctahedra, faces with six equivalent Co(2)Dy2Co10 cuboctahedra, and faces with eight equivalent Co(1)Dy2Co10 cuboctahedra. In the third Co site, Co(3) is bonded in a 14-coordinate geometry to one Dy(1), one Co(3), three equivalent Co(2), three equivalent Co(4), and six equivalent Co(1) atoms. In the fourth Co site, Co(4) is bonded to one Dy(1), two equivalent Dy(2), one Co(3), two equivalent Co(2), two equivalent Co(4), and four equivalent Co(1) atoms to form distorted CoDy3Co9 cuboctahedra that share corners with five equivalent Co(2)Dy2Co10 cuboctahedra, corners with eight equivalent Co(1)Dy2Co10 cuboctahedra, corners with ten equivalent Co(4)Dy3Co9 cuboctahedra, edges with two equivalent Co(1)Dy2Co10 cuboctahedra, edges with three equivalent Co(2)Dy2Co10 cuboctahedra, edges with five equivalent Co(4)Dy3Co9 cuboctahedra, faces with two equivalent Co(2)Dy2Co10 cuboctahedra, faces with eight equivalent Co(4)Dy3Co9 cuboctahedra, and faces with ten equivalent Co(1)Dy2Co10 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Dy2Co17
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.300
_cell_length_b   8.300
_cell_length_c   8.105
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   483.539
_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
  Dy  Dy0  1  0.333  0.667  0.750  1.0
  Dy  Dy1  1  0.000  0.000  0.250  1.0
  Dy  Dy2  1  0.667  0.333  0.250  1.0
  Dy  Dy3  1  0.000  0.000  0.750  1.0
  Co  Co4  1  0.624  0.953  0.250  1.0
  Co  Co5  1  0.671  0.624  0.750  1.0
  Co  Co6  1  0.500  0.000  0.000  1.0
  Co  Co7  1  0.667  0.333  0.607  1.0
  Co  Co8  1  0.329  0.376  0.250  1.0
  Co  Co9  1  0.167  0.334  0.520  1.0
  Co  Co10  1  0.334  0.167  0.020  1.0
  Co  Co11  1  0.833  0.666  0.480  1.0
  Co  Co12  1  0.047  0.376  0.250  1.0
  Co  Co13  1  0.329  0.953  0.250  1.0
  Co  Co14  1  0.047  0.671  0.250  1.0
  Co  Co15  1  0.833  0.167  0.020  1.0
  Co  Co16  1  0.333  0.667  0.393  1.0
  Co  Co17  1  0.624  0.671  0.250  1.0
  Co  Co18  1  0.666  0.833  0.980  1.0
  Co  Co19  1  0.167  0.833  0.980  1.0
  Co  Co20  1  0.167  0.833  0.520  1.0
  Co  Co21  1  0.666  0.833  0.520  1.0
  Co  Co22  1  0.333  0.667  0.107  1.0
  Co  Co23  1  0.500  0.000  0.500  1.0
  Co  Co24  1  0.376  0.329  0.750  1.0
  Co  Co25  1  0.500  0.500  0.000  1.0
  Co  Co26  1  0.671  0.047  0.750  1.0
  Co  Co27  1  0.376  0.047  0.750  1.0
  Co  Co28  1  0.167  0.334  0.980  1.0
  Co  Co29  1  0.667  0.333  0.893  1.0
  Co  Co30  1  0.833  0.167  0.480  1.0
  Co  Co31  1  0.833  0.666  0.020  1.0
  Co  Co32  1  0.000  0.500  0.000  1.0
  Co  Co33  1  0.953  0.329  0.750  1.0
  Co  Co34  1  0.953  0.624  0.750  1.0
  Co  Co35  1  0.000  0.500  0.500  1.0
  Co  Co36  1  0.334  0.167  0.480  1.0
  Co  Co37  1  0.500  0.500  0.500  1.0
[/CIF]
.