The compound described by Y4ZrNi25 crystallizes in the orthorhombic Cmmm space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a 18-coordinate geometry to one Ni(2), one Ni(5), two equivalent Ni(1), two equivalent Ni(4), four equivalent Ni(10), four equivalent Ni(7), and four equivalent Ni(9) atoms. In the second Y site, Y(2) is bonded in a 18-coordinate geometry to one Ni(4), two equivalent Ni(2), three equivalent Ni(3), four equivalent Ni(10), four equivalent Ni(11), and four equivalent Ni(8) atoms. Zr(1) is bonded in a 18-coordinate geometry to two equivalent Ni(1), four equivalent Ni(5), four equivalent Ni(6), and eight equivalent Ni(9) atoms. There are eleven inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 9-coordinate geometry to two equivalent Y(1), one Zr(1), two equivalent Ni(5), two equivalent Ni(7), and four equivalent Ni(9) atoms. In the second Ni site, Ni(2) is bonded in a 9-coordinate geometry to one Y(1), two equivalent Y(2), two equivalent Ni(8), and four equivalent Ni(10) atoms. In the third Ni site, Ni(3) is bonded in a 9-coordinate geometry to three equivalent Y(2), two equivalent Ni(8), and four equivalent Ni(11) atoms. In the fourth Ni site, Ni(4) is bonded in a 9-coordinate geometry to one Y(2), two equivalent Y(1), two equivalent Ni(7), and four equivalent Ni(10) atoms. In the fifth Ni site, Ni(5) is bonded in a 12-coordinate geometry to one Y(1), two equivalent Zr(1), one Ni(5), two equivalent Ni(1), two equivalent Ni(6), and four equivalent Ni(9) atoms. In the sixth Ni site, Ni(6) is bonded to four equivalent Zr(1), four equivalent Ni(5), and four equivalent Ni(9) atoms to form NiZr4Ni8 cuboctahedra that share corners with four equivalent Ni(7)Y4Ni8 cuboctahedra, corners with four equivalent Ni(6)Zr4Ni8 cuboctahedra, corners with eight equivalent Ni(9)Y2Zr2Ni8 cuboctahedra, edges with two equivalent Ni(6)Zr4Ni8 cuboctahedra, edges with eight equivalent Ni(9)Y2Zr2Ni8 cuboctahedra, faces with two equivalent Ni(6)Zr4Ni8 cuboctahedra, and faces with eight equivalent Ni(9)Y2Zr2Ni8 cuboctahedra. In the seventh Ni site, Ni(7) is bonded to four equivalent Y(1), two equivalent Ni(1), two equivalent Ni(10), two equivalent Ni(4), and two equivalent Ni(9) atoms to form NiY4Ni8 cuboctahedra that share corners with two equivalent Ni(8)Y4Ni8 cuboctahedra, corners with two equivalent Ni(6)Zr4Ni8 cuboctahedra, corners with four equivalent Ni(9)Y2Zr2Ni8 cuboctahedra, corners with four equivalent Ni(10)Y4Ni8 cuboctahedra, corners with four equivalent Ni(7)Y4Ni8 cuboctahedra, edges with two equivalent Ni(7)Y4Ni8 cuboctahedra, edges with four equivalent Ni(9)Y2Zr2Ni8 cuboctahedra, edges with four equivalent Ni(10)Y4Ni8 cuboctahedra, faces with two equivalent Ni(7)Y4Ni8 cuboctahedra, faces with four equivalent Ni(9)Y2Zr2Ni8 cuboctahedra, and faces with four equivalent Ni(10)Y4Ni8 cuboctahedra. In the eighth Ni site, Ni(8) is bonded to four equivalent Y(2), two equivalent Ni(10), two equivalent Ni(11), two equivalent Ni(2), and two equivalent Ni(3) atoms to form a mixture of edge, face, and corner-sharing NiY4Ni8 cuboctahedra. In the ninth Ni site, Ni(9) is bonded to two equivalent Y(1), two equivalent Zr(1), one Ni(6), one Ni(7), two equivalent Ni(1), two equivalent Ni(5), and two equivalent Ni(9) atoms to form NiY2Zr2Ni8 cuboctahedra that share corners with two equivalent Ni(7)Y4Ni8 cuboctahedra, corners with two equivalent Ni(6)Zr4Ni8 cuboctahedra, corners with five equivalent Ni(10)Y4Ni8 cuboctahedra, corners with seven equivalent Ni(9)Y2Zr2Ni8 cuboctahedra,  an edgeedge with one Ni(10)Y4Ni8 cuboctahedra, edges with two equivalent Ni(7)Y4Ni8 cuboctahedra, edges with two equivalent Ni(6)Zr4Ni8 cuboctahedra, edges with five equivalent Ni(9)Y2Zr2Ni8 cuboctahedra,  a faceface with one Ni(10)Y4Ni8 cuboctahedra, faces with two equivalent Ni(7)Y4Ni8 cuboctahedra, faces with two equivalent Ni(6)Zr4Ni8 cuboctahedra, and faces with five equivalent Ni(9)Y2Zr2Ni8 cuboctahedra. In the tenth Ni site, Ni(10) is bonded to two equivalent Y(1), two equivalent Y(2), one Ni(7), one Ni(8), two equivalent Ni(10), two equivalent Ni(2), and two equivalent Ni(4) atoms to form NiY4Ni8 cuboctahedra that share corners with two equivalent Ni(10)Y4Ni8 cuboctahedra, corners with two equivalent Ni(7)Y4Ni8 cuboctahedra, corners with two equivalent Ni(8)Y4Ni8 cuboctahedra, corners with five equivalent Ni(9)Y2Zr2Ni8 cuboctahedra, corners with five equivalent Ni(11)Y4Ni8 cuboctahedra,  an edgeedge with one Ni(9)Y2Zr2Ni8 cuboctahedra,  an edgeedge with one Ni(11)Y4Ni8 cuboctahedra, edges with two equivalent Ni(7)Y4Ni8 cuboctahedra, edges with two equivalent Ni(8)Y4Ni8 cuboctahedra, edges with four equivalent Ni(10)Y4Ni8 cuboctahedra,  a faceface with one Ni(9)Y2Zr2Ni8 cuboctahedra,  a faceface with one Ni(11)Y4Ni8 cuboctahedra, faces with two equivalent Ni(7)Y4Ni8 cuboctahedra, faces with two equivalent Ni(8)Y4Ni8 cuboctahedra, and faces with four equivalent Ni(10)Y4Ni8 cuboctahedra. In the eleventh Ni site, Ni(11) is bonded to four equivalent Y(2), two equivalent Ni(11), two equivalent Ni(8), and four equivalent Ni(3) atoms to form a mixture of edge, face, and corner-sharing NiY4Ni8 cuboctahedra. is represented by the CIF file [CIF]
data_Y4ZrNi25
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.926
_cell_length_b   4.876
_cell_length_c   21.181
_cell_angle_alpha   83.390
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   402.817
_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
  Y  Y0  1  0.000  0.400  0.200  1.0
  Y  Y1  1  0.000  0.800  0.400  1.0
  Y  Y2  1  0.000  0.200  0.600  1.0
  Y  Y3  1  0.000  0.600  0.800  1.0
  Zr  Zr4  1  0.000  1.000  0.000  1.0
  Ni  Ni5  1  0.000  0.934  0.131  1.0
  Ni  Ni6  1  0.000  0.333  0.333  1.0
  Ni  Ni7  1  0.000  0.733  0.533  1.0
  Ni  Ni8  1  0.000  0.133  0.733  1.0
  Ni  Ni9  1  0.000  0.532  0.935  1.0
  Ni  Ni10  1  0.000  0.468  0.065  1.0
  Ni  Ni11  1  0.000  0.867  0.267  1.0
  Ni  Ni12  1  0.000  0.267  0.467  1.0
  Ni  Ni13  1  0.000  0.667  0.667  1.0
  Ni  Ni14  1  0.000  0.066  0.869  1.0
  Ni  Ni15  1  0.500  0.500  0.000  1.0
  Ni  Ni16  1  0.500  0.900  0.200  1.0
  Ni  Ni17  1  0.500  0.300  0.400  1.0
  Ni  Ni18  1  0.500  0.700  0.600  1.0
  Ni  Ni19  1  0.500  0.100  0.800  1.0
  Ni  Ni20  1  0.500  0.198  0.099  1.0
  Ni  Ni21  1  0.500  0.600  0.300  1.0
  Ni  Ni22  1  0.500  1.000  0.500  1.0
  Ni  Ni23  1  0.500  0.400  0.700  1.0
  Ni  Ni24  1  0.500  0.802  0.901  1.0
  Ni  Ni25  1  0.500  0.704  0.099  1.0
  Ni  Ni26  1  0.500  0.100  0.300  1.0
  Ni  Ni27  1  0.500  0.500  0.500  1.0
  Ni  Ni28  1  0.500  0.900  0.700  1.0
  Ni  Ni29  1  0.500  0.296  0.901  1.0
[/CIF]
.
The compound described by Y4ZrNi25 crystallizes in the orthorhombic Cmmm space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a 18-coordinate geometry to one Ni(2), one Ni(5), two equivalent Ni(1), two equivalent Ni(4), four equivalent Ni(10), four equivalent Ni(7), and four equivalent Ni(9) atoms. In the second Y site, Y(2) is bonded in a 18-coordinate geometry to one Ni(4), two equivalent Ni(2), three equivalent Ni(3), four equivalent Ni(10), four equivalent Ni(11), and four equivalent Ni(8) atoms. Zr(1) is bonded in a 18-coordinate geometry to two equivalent Ni(1), four equivalent Ni(5), four equivalent Ni(6), and eight equivalent Ni(9) atoms. There are eleven inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 9-coordinate geometry to two equivalent Y(1), one Zr(1), two equivalent Ni(5), two equivalent Ni(7), and four equivalent Ni(9) atoms. In the second Ni site, Ni(2) is bonded in a 9-coordinate geometry to one Y(1), two equivalent Y(2), two equivalent Ni(8), and four equivalent Ni(10) atoms. In the third Ni site, Ni(3) is bonded in a 9-coordinate geometry to three equivalent Y(2), two equivalent Ni(8), and four equivalent Ni(11) atoms. In the fourth Ni site, Ni(4) is bonded in a 9-coordinate geometry to one Y(2), two equivalent Y(1), two equivalent Ni(7), and four equivalent Ni(10) atoms. In the fifth Ni site, Ni(5) is bonded in a 12-coordinate geometry to one Y(1), two equivalent Zr(1), one Ni(5), two equivalent Ni(1), two equivalent Ni(6), and four equivalent Ni(9) atoms. In the sixth Ni site, Ni(6) is bonded to four equivalent Zr(1), four equivalent Ni(5), and four equivalent Ni(9) atoms to form NiZr4Ni8 cuboctahedra that share corners with four equivalent Ni(7)Y4Ni8 cuboctahedra, corners with four equivalent Ni(6)Zr4Ni8 cuboctahedra, corners with eight equivalent Ni(9)Y2Zr2Ni8 cuboctahedra, edges with two equivalent Ni(6)Zr4Ni8 cuboctahedra, edges with eight equivalent Ni(9)Y2Zr2Ni8 cuboctahedra, faces with two equivalent Ni(6)Zr4Ni8 cuboctahedra, and faces with eight equivalent Ni(9)Y2Zr2Ni8 cuboctahedra. In the seventh Ni site, Ni(7) is bonded to four equivalent Y(1), two equivalent Ni(1), two equivalent Ni(10), two equivalent Ni(4), and two equivalent Ni(9) atoms to form NiY4Ni8 cuboctahedra that share corners with two equivalent Ni(8)Y4Ni8 cuboctahedra, corners with two equivalent Ni(6)Zr4Ni8 cuboctahedra, corners with four equivalent Ni(9)Y2Zr2Ni8 cuboctahedra, corners with four equivalent Ni(10)Y4Ni8 cuboctahedra, corners with four equivalent Ni(7)Y4Ni8 cuboctahedra, edges with two equivalent Ni(7)Y4Ni8 cuboctahedra, edges with four equivalent Ni(9)Y2Zr2Ni8 cuboctahedra, edges with four equivalent Ni(10)Y4Ni8 cuboctahedra, faces with two equivalent Ni(7)Y4Ni8 cuboctahedra, faces with four equivalent Ni(9)Y2Zr2Ni8 cuboctahedra, and faces with four equivalent Ni(10)Y4Ni8 cuboctahedra. In the eighth Ni site, Ni(8) is bonded to four equivalent Y(2), two equivalent Ni(10), two equivalent Ni(11), two equivalent Ni(2), and two equivalent Ni(3) atoms to form a mixture of edge, face, and corner-sharing NiY4Ni8 cuboctahedra. In the ninth Ni site, Ni(9) is bonded to two equivalent Y(1), two equivalent Zr(1), one Ni(6), one Ni(7), two equivalent Ni(1), two equivalent Ni(5), and two equivalent Ni(9) atoms to form NiY2Zr2Ni8 cuboctahedra that share corners with two equivalent Ni(7)Y4Ni8 cuboctahedra, corners with two equivalent Ni(6)Zr4Ni8 cuboctahedra, corners with five equivalent Ni(10)Y4Ni8 cuboctahedra, corners with seven equivalent Ni(9)Y2Zr2Ni8 cuboctahedra,  an edgeedge with one Ni(10)Y4Ni8 cuboctahedra, edges with two equivalent Ni(7)Y4Ni8 cuboctahedra, edges with two equivalent Ni(6)Zr4Ni8 cuboctahedra, edges with five equivalent Ni(9)Y2Zr2Ni8 cuboctahedra,  a faceface with one Ni(10)Y4Ni8 cuboctahedra, faces with two equivalent Ni(7)Y4Ni8 cuboctahedra, faces with two equivalent Ni(6)Zr4Ni8 cuboctahedra, and faces with five equivalent Ni(9)Y2Zr2Ni8 cuboctahedra. In the tenth Ni site, Ni(10) is bonded to two equivalent Y(1), two equivalent Y(2), one Ni(7), one Ni(8), two equivalent Ni(10), two equivalent Ni(2), and two equivalent Ni(4) atoms to form NiY4Ni8 cuboctahedra that share corners with two equivalent Ni(10)Y4Ni8 cuboctahedra, corners with two equivalent Ni(7)Y4Ni8 cuboctahedra, corners with two equivalent Ni(8)Y4Ni8 cuboctahedra, corners with five equivalent Ni(9)Y2Zr2Ni8 cuboctahedra, corners with five equivalent Ni(11)Y4Ni8 cuboctahedra,  an edgeedge with one Ni(9)Y2Zr2Ni8 cuboctahedra,  an edgeedge with one Ni(11)Y4Ni8 cuboctahedra, edges with two equivalent Ni(7)Y4Ni8 cuboctahedra, edges with two equivalent Ni(8)Y4Ni8 cuboctahedra, edges with four equivalent Ni(10)Y4Ni8 cuboctahedra,  a faceface with one Ni(9)Y2Zr2Ni8 cuboctahedra,  a faceface with one Ni(11)Y4Ni8 cuboctahedra, faces with two equivalent Ni(7)Y4Ni8 cuboctahedra, faces with two equivalent Ni(8)Y4Ni8 cuboctahedra, and faces with four equivalent Ni(10)Y4Ni8 cuboctahedra. In the eleventh Ni site, Ni(11) is bonded to four equivalent Y(2), two equivalent Ni(11), two equivalent Ni(8), and four equivalent Ni(3) atoms to form a mixture of edge, face, and corner-sharing NiY4Ni8 cuboctahedra. is represented by the CIF file [CIF]
data_Y4ZrNi25
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.926
_cell_length_b   4.876
_cell_length_c   21.181
_cell_angle_alpha   83.390
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   402.817
_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
  Y  Y0  1  0.000  0.400  0.200  1.0
  Y  Y1  1  0.000  0.800  0.400  1.0
  Y  Y2  1  0.000  0.200  0.600  1.0
  Y  Y3  1  0.000  0.600  0.800  1.0
  Zr  Zr4  1  0.000  1.000  0.000  1.0
  Ni  Ni5  1  0.000  0.934  0.131  1.0
  Ni  Ni6  1  0.000  0.333  0.333  1.0
  Ni  Ni7  1  0.000  0.733  0.533  1.0
  Ni  Ni8  1  0.000  0.133  0.733  1.0
  Ni  Ni9  1  0.000  0.532  0.935  1.0
  Ni  Ni10  1  0.000  0.468  0.065  1.0
  Ni  Ni11  1  0.000  0.867  0.267  1.0
  Ni  Ni12  1  0.000  0.267  0.467  1.0
  Ni  Ni13  1  0.000  0.667  0.667  1.0
  Ni  Ni14  1  0.000  0.066  0.869  1.0
  Ni  Ni15  1  0.500  0.500  0.000  1.0
  Ni  Ni16  1  0.500  0.900  0.200  1.0
  Ni  Ni17  1  0.500  0.300  0.400  1.0
  Ni  Ni18  1  0.500  0.700  0.600  1.0
  Ni  Ni19  1  0.500  0.100  0.800  1.0
  Ni  Ni20  1  0.500  0.198  0.099  1.0
  Ni  Ni21  1  0.500  0.600  0.300  1.0
  Ni  Ni22  1  0.500  1.000  0.500  1.0
  Ni  Ni23  1  0.500  0.400  0.700  1.0
  Ni  Ni24  1  0.500  0.802  0.901  1.0
  Ni  Ni25  1  0.500  0.704  0.099  1.0
  Ni  Ni26  1  0.500  0.100  0.300  1.0
  Ni  Ni27  1  0.500  0.500  0.500  1.0
  Ni  Ni28  1  0.500  0.900  0.700  1.0
  Ni  Ni29  1  0.500  0.296  0.901  1.0
[/CIF]
.