The material structure described by Dy2Ni7 crystallizes in the monoclinic C2/m space group. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded in a 18-coordinate geometry to two equivalent Ni(2), two equivalent Ni(6), three equivalent Ni(3), three equivalent Ni(4), four equivalent Ni(1), and four equivalent Ni(5) atoms. In the second Dy site, Dy(2) is bonded in a 12-coordinate geometry to three equivalent Ni(6), three equivalent Ni(7), and six equivalent Ni(5) atoms. There are seven inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to four equivalent Dy(1), two equivalent Ni(1), two equivalent Ni(2), two equivalent Ni(3), and two equivalent Ni(4) atoms to form NiDy4Ni8 cuboctahedra that share corners with four equivalent Ni(1)Dy4Ni8 cuboctahedra, corners with four equivalent Ni(6)Dy5Ni7 cuboctahedra, corners with eight equivalent Ni(5)Dy5Ni7 cuboctahedra, edges with two equivalent Ni(1)Dy4Ni8 cuboctahedra, edges with four equivalent Ni(5)Dy5Ni7 cuboctahedra, edges with four equivalent Ni(6)Dy5Ni7 cuboctahedra, faces with two equivalent Ni(5)Dy5Ni7 cuboctahedra, faces with four equivalent Ni(1)Dy4Ni8 cuboctahedra, and faces with four equivalent Ni(2)Dy4Ni8 cuboctahedra. In the second Ni site, Ni(2) is bonded to four equivalent Dy(1), two equivalent Ni(3), two equivalent Ni(4), and four equivalent Ni(1) atoms to form NiDy4Ni8 cuboctahedra that share corners with four equivalent Ni(2)Dy4Ni8 cuboctahedra, corners with four equivalent Ni(6)Dy5Ni7 cuboctahedra, corners with eight equivalent Ni(5)Dy5Ni7 cuboctahedra, edges with two equivalent Ni(2)Dy4Ni8 cuboctahedra, edges with eight equivalent Ni(5)Dy5Ni7 cuboctahedra, faces with two equivalent Ni(6)Dy5Ni7 cuboctahedra, and faces with eight equivalent Ni(1)Dy4Ni8 cuboctahedra. In the third Ni site, Ni(3) is bonded in a 9-coordinate geometry to three equivalent Dy(1), one Ni(2), one Ni(6), two equivalent Ni(1), and two equivalent Ni(5) atoms. In the fourth Ni site, Ni(4) is bonded in a 9-coordinate geometry to three equivalent Dy(1), one Ni(2), one Ni(6), two equivalent Ni(1), and two equivalent Ni(5) atoms. In the fifth Ni site, Ni(5) is bonded to two equivalent Dy(1), three equivalent Dy(2), one Ni(3), one Ni(4), one Ni(7), two equivalent Ni(5), and two equivalent Ni(6) atoms to form distorted NiDy5Ni7 cuboctahedra that share corners with two equivalent Ni(2)Dy4Ni8 cuboctahedra, corners with two equivalent Ni(6)Dy5Ni7 cuboctahedra, corners with two equivalent Ni(7)Dy6Ni6 cuboctahedra, corners with four equivalent Ni(1)Dy4Ni8 cuboctahedra, corners with seven equivalent Ni(5)Dy5Ni7 cuboctahedra, edges with two equivalent Ni(1)Dy4Ni8 cuboctahedra, edges with two equivalent Ni(2)Dy4Ni8 cuboctahedra, edges with four equivalent Ni(5)Dy5Ni7 cuboctahedra,  a faceface with one Ni(1)Dy4Ni8 cuboctahedra, faces with three equivalent Ni(7)Dy6Ni6 cuboctahedra, faces with five equivalent Ni(5)Dy5Ni7 cuboctahedra, and faces with five equivalent Ni(6)Dy5Ni7 cuboctahedra. In the sixth Ni site, Ni(6) is bonded to two equivalent Dy(1), three equivalent Dy(2), one Ni(3), one Ni(4), one Ni(7), and four equivalent Ni(5) atoms to form distorted NiDy5Ni7 cuboctahedra that share corners with two equivalent Ni(2)Dy4Ni8 cuboctahedra, corners with two equivalent Ni(7)Dy6Ni6 cuboctahedra, corners with four equivalent Ni(1)Dy4Ni8 cuboctahedra, corners with four equivalent Ni(5)Dy5Ni7 cuboctahedra, corners with five equivalent Ni(6)Dy5Ni7 cuboctahedra, edges with four equivalent Ni(1)Dy4Ni8 cuboctahedra, edges with four equivalent Ni(6)Dy5Ni7 cuboctahedra,  a faceface with one Ni(2)Dy4Ni8 cuboctahedra, faces with three equivalent Ni(7)Dy6Ni6 cuboctahedra, and faces with ten equivalent Ni(5)Dy5Ni7 cuboctahedra. In the seventh Ni site, Ni(7) is bonded to six equivalent Dy(2), two equivalent Ni(6), and four equivalent Ni(5) atoms to form NiDy6Ni6 cuboctahedra that share corners with four equivalent Ni(6)Dy5Ni7 cuboctahedra, corners with eight equivalent Ni(5)Dy5Ni7 cuboctahedra, edges with six equivalent Ni(7)Dy6Ni6 cuboctahedra, faces with six equivalent Ni(6)Dy5Ni7 cuboctahedra, and faces with twelve equivalent Ni(5)Dy5Ni7 cuboctahedra. is represented by the CIF card [CIF]
data_Dy2Ni7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.849
_cell_length_b   4.849
_cell_length_c   12.193
_cell_angle_alpha   101.447
_cell_angle_beta   78.554
_cell_angle_gamma   119.981
_symmetry_Int_Tables_number   1
_cell_volume   241.699
_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  0.948  0.052  0.152  1.0
  Dy  Dy1  1  0.853  0.147  0.441  1.0
  Dy  Dy2  1  0.147  0.853  0.559  1.0
  Dy  Dy3  1  0.052  0.948  0.848  1.0
  Ni  Ni4  1  0.500  1.000  1.000  1.0
  Ni  Ni5  1  1.000  0.500  0.000  1.0
  Ni  Ni6  1  0.500  0.500  1.000  1.0
  Ni  Ni7  1  0.610  0.390  0.164  1.0
  Ni  Ni8  1  0.277  0.723  0.165  1.0
  Ni  Ni9  1  0.390  0.108  0.328  1.0
  Ni  Ni10  1  0.390  0.610  0.328  1.0
  Ni  Ni11  1  0.892  0.610  0.328  1.0
  Ni  Ni12  1  0.500  0.500  0.500  1.0
  Ni  Ni13  1  0.108  0.390  0.672  1.0
  Ni  Ni14  1  0.610  0.390  0.672  1.0
  Ni  Ni15  1  0.610  0.892  0.672  1.0
  Ni  Ni16  1  0.723  0.277  0.835  1.0
  Ni  Ni17  1  0.390  0.610  0.836  1.0
[/CIF]
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The material structure described by Dy2Ni7 crystallizes in the monoclinic C2/m space group. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded in a 18-coordinate geometry to two equivalent Ni(2), two equivalent Ni(6), three equivalent Ni(3), three equivalent Ni(4), four equivalent Ni(1), and four equivalent Ni(5) atoms. In the second Dy site, Dy(2) is bonded in a 12-coordinate geometry to three equivalent Ni(6), three equivalent Ni(7), and six equivalent Ni(5) atoms. There are seven inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to four equivalent Dy(1), two equivalent Ni(1), two equivalent Ni(2), two equivalent Ni(3), and two equivalent Ni(4) atoms to form NiDy4Ni8 cuboctahedra that share corners with four equivalent Ni(1)Dy4Ni8 cuboctahedra, corners with four equivalent Ni(6)Dy5Ni7 cuboctahedra, corners with eight equivalent Ni(5)Dy5Ni7 cuboctahedra, edges with two equivalent Ni(1)Dy4Ni8 cuboctahedra, edges with four equivalent Ni(5)Dy5Ni7 cuboctahedra, edges with four equivalent Ni(6)Dy5Ni7 cuboctahedra, faces with two equivalent Ni(5)Dy5Ni7 cuboctahedra, faces with four equivalent Ni(1)Dy4Ni8 cuboctahedra, and faces with four equivalent Ni(2)Dy4Ni8 cuboctahedra. In the second Ni site, Ni(2) is bonded to four equivalent Dy(1), two equivalent Ni(3), two equivalent Ni(4), and four equivalent Ni(1) atoms to form NiDy4Ni8 cuboctahedra that share corners with four equivalent Ni(2)Dy4Ni8 cuboctahedra, corners with four equivalent Ni(6)Dy5Ni7 cuboctahedra, corners with eight equivalent Ni(5)Dy5Ni7 cuboctahedra, edges with two equivalent Ni(2)Dy4Ni8 cuboctahedra, edges with eight equivalent Ni(5)Dy5Ni7 cuboctahedra, faces with two equivalent Ni(6)Dy5Ni7 cuboctahedra, and faces with eight equivalent Ni(1)Dy4Ni8 cuboctahedra. In the third Ni site, Ni(3) is bonded in a 9-coordinate geometry to three equivalent Dy(1), one Ni(2), one Ni(6), two equivalent Ni(1), and two equivalent Ni(5) atoms. In the fourth Ni site, Ni(4) is bonded in a 9-coordinate geometry to three equivalent Dy(1), one Ni(2), one Ni(6), two equivalent Ni(1), and two equivalent Ni(5) atoms. In the fifth Ni site, Ni(5) is bonded to two equivalent Dy(1), three equivalent Dy(2), one Ni(3), one Ni(4), one Ni(7), two equivalent Ni(5), and two equivalent Ni(6) atoms to form distorted NiDy5Ni7 cuboctahedra that share corners with two equivalent Ni(2)Dy4Ni8 cuboctahedra, corners with two equivalent Ni(6)Dy5Ni7 cuboctahedra, corners with two equivalent Ni(7)Dy6Ni6 cuboctahedra, corners with four equivalent Ni(1)Dy4Ni8 cuboctahedra, corners with seven equivalent Ni(5)Dy5Ni7 cuboctahedra, edges with two equivalent Ni(1)Dy4Ni8 cuboctahedra, edges with two equivalent Ni(2)Dy4Ni8 cuboctahedra, edges with four equivalent Ni(5)Dy5Ni7 cuboctahedra,  a faceface with one Ni(1)Dy4Ni8 cuboctahedra, faces with three equivalent Ni(7)Dy6Ni6 cuboctahedra, faces with five equivalent Ni(5)Dy5Ni7 cuboctahedra, and faces with five equivalent Ni(6)Dy5Ni7 cuboctahedra. In the sixth Ni site, Ni(6) is bonded to two equivalent Dy(1), three equivalent Dy(2), one Ni(3), one Ni(4), one Ni(7), and four equivalent Ni(5) atoms to form distorted NiDy5Ni7 cuboctahedra that share corners with two equivalent Ni(2)Dy4Ni8 cuboctahedra, corners with two equivalent Ni(7)Dy6Ni6 cuboctahedra, corners with four equivalent Ni(1)Dy4Ni8 cuboctahedra, corners with four equivalent Ni(5)Dy5Ni7 cuboctahedra, corners with five equivalent Ni(6)Dy5Ni7 cuboctahedra, edges with four equivalent Ni(1)Dy4Ni8 cuboctahedra, edges with four equivalent Ni(6)Dy5Ni7 cuboctahedra,  a faceface with one Ni(2)Dy4Ni8 cuboctahedra, faces with three equivalent Ni(7)Dy6Ni6 cuboctahedra, and faces with ten equivalent Ni(5)Dy5Ni7 cuboctahedra. In the seventh Ni site, Ni(7) is bonded to six equivalent Dy(2), two equivalent Ni(6), and four equivalent Ni(5) atoms to form NiDy6Ni6 cuboctahedra that share corners with four equivalent Ni(6)Dy5Ni7 cuboctahedra, corners with eight equivalent Ni(5)Dy5Ni7 cuboctahedra, edges with six equivalent Ni(7)Dy6Ni6 cuboctahedra, faces with six equivalent Ni(6)Dy5Ni7 cuboctahedra, and faces with twelve equivalent Ni(5)Dy5Ni7 cuboctahedra. is represented by the CIF card [CIF]
data_Dy2Ni7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.849
_cell_length_b   4.849
_cell_length_c   12.193
_cell_angle_alpha   101.447
_cell_angle_beta   78.554
_cell_angle_gamma   119.981
_symmetry_Int_Tables_number   1
_cell_volume   241.699
_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  0.948  0.052  0.152  1.0
  Dy  Dy1  1  0.853  0.147  0.441  1.0
  Dy  Dy2  1  0.147  0.853  0.559  1.0
  Dy  Dy3  1  0.052  0.948  0.848  1.0
  Ni  Ni4  1  0.500  1.000  1.000  1.0
  Ni  Ni5  1  1.000  0.500  0.000  1.0
  Ni  Ni6  1  0.500  0.500  1.000  1.0
  Ni  Ni7  1  0.610  0.390  0.164  1.0
  Ni  Ni8  1  0.277  0.723  0.165  1.0
  Ni  Ni9  1  0.390  0.108  0.328  1.0
  Ni  Ni10  1  0.390  0.610  0.328  1.0
  Ni  Ni11  1  0.892  0.610  0.328  1.0
  Ni  Ni12  1  0.500  0.500  0.500  1.0
  Ni  Ni13  1  0.108  0.390  0.672  1.0
  Ni  Ni14  1  0.610  0.390  0.672  1.0
  Ni  Ni15  1  0.610  0.892  0.672  1.0
  Ni  Ni16  1  0.723  0.277  0.835  1.0
  Ni  Ni17  1  0.390  0.610  0.836  1.0
[/CIF]
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