The material structure described by UFe5Ni5Si2 crystallizes in the triclinic P-1 space group. U(1) is bonded in a 20-coordinate geometry to two equivalent Fe(3), four equivalent Fe(1), four equivalent Fe(2), two equivalent Ni(1), two equivalent Ni(2), two equivalent Ni(3), two equivalent Ni(4), and two equivalent Si(1) atoms. There are three inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to two equivalent U(1), one Fe(3), two equivalent Fe(2), one Ni(2), one Ni(3), one Ni(4), two equivalent Ni(1), and two equivalent Si(1) atoms to form distorted FeU2Fe3Si2Ni5 cuboctahedra that share corners with two equivalent Fe(3)U2Fe4Si2Ni4 cuboctahedra, corners with two equivalent Ni(3)U2Fe4Si2Ni4 cuboctahedra, corners with two equivalent Ni(4)U2Fe4Si2Ni4 cuboctahedra, corners with two equivalent Ni(2)U2Fe6Si2Ni2 cuboctahedra, corners with four equivalent Fe(2)U2Fe3Si2Ni5 cuboctahedra, corners with six equivalent Fe(1)U2Fe3Si2Ni5 cuboctahedra,  an edgeedge with one Fe(3)U2Fe4Si2Ni4 cuboctahedra,  an edgeedge with one Ni(3)U2Fe4Si2Ni4 cuboctahedra,  an edgeedge with one Ni(4)U2Fe4Si2Ni4 cuboctahedra,  an edgeedge with one Ni(2)U2Fe6Si2Ni2 cuboctahedra, edges with three equivalent Fe(1)U2Fe3Si2Ni5 cuboctahedra,  a faceface with one Fe(1)U2Fe3Si2Ni5 cuboctahedra, faces with two equivalent Fe(3)U2Fe4Si2Ni4 cuboctahedra, faces with two equivalent Ni(3)U2Fe4Si2Ni4 cuboctahedra, faces with two equivalent Ni(4)U2Fe4Si2Ni4 cuboctahedra, faces with two equivalent Ni(2)U2Fe6Si2Ni2 cuboctahedra, and faces with six equivalent Fe(2)U2Fe3Si2Ni5 cuboctahedra. In the second Fe site, Fe(2) is bonded to two equivalent U(1), one Fe(3), two equivalent Fe(1), one Ni(2), one Ni(3), one Ni(4), two equivalent Ni(1), and two equivalent Si(1) atoms to form distorted FeU2Fe3Si2Ni5 cuboctahedra that share corners with two equivalent Fe(3)U2Fe4Si2Ni4 cuboctahedra, corners with two equivalent Ni(3)U2Fe4Si2Ni4 cuboctahedra, corners with two equivalent Ni(4)U2Fe4Si2Ni4 cuboctahedra, corners with two equivalent Ni(2)U2Fe6Si2Ni2 cuboctahedra, corners with four equivalent Fe(1)U2Fe3Si2Ni5 cuboctahedra, corners with six equivalent Fe(2)U2Fe3Si2Ni5 cuboctahedra,  an edgeedge with one Fe(3)U2Fe4Si2Ni4 cuboctahedra,  an edgeedge with one Ni(3)U2Fe4Si2Ni4 cuboctahedra,  an edgeedge with one Ni(4)U2Fe4Si2Ni4 cuboctahedra,  an edgeedge with one Ni(2)U2Fe6Si2Ni2 cuboctahedra, edges with three equivalent Fe(2)U2Fe3Si2Ni5 cuboctahedra,  a faceface with one Fe(2)U2Fe3Si2Ni5 cuboctahedra, faces with two equivalent Fe(3)U2Fe4Si2Ni4 cuboctahedra, faces with two equivalent Ni(3)U2Fe4Si2Ni4 cuboctahedra, faces with two equivalent Ni(4)U2Fe4Si2Ni4 cuboctahedra, faces with two equivalent Ni(2)U2Fe6Si2Ni2 cuboctahedra, and faces with six equivalent Fe(1)U2Fe3Si2Ni5 cuboctahedra. In the third Fe site, Fe(3) is bonded to two equivalent U(1), two equivalent Fe(1), two equivalent Fe(2), two equivalent Ni(1), two equivalent Ni(2), and two equivalent Si(1) atoms to form distorted FeU2Fe4Si2Ni4 cuboctahedra that share corners with two equivalent Ni(3)U2Fe4Si2Ni4 cuboctahedra, corners with two equivalent Ni(4)U2Fe4Si2Ni4 cuboctahedra, corners with two equivalent Ni(2)U2Fe6Si2Ni2 cuboctahedra, corners with four equivalent Fe(1)U2Fe3Si2Ni5 cuboctahedra, corners with four equivalent Fe(2)U2Fe3Si2Ni5 cuboctahedra, corners with four equivalent Fe(3)U2Fe4Si2Ni4 cuboctahedra, edges with two equivalent Fe(1)U2Fe3Si2Ni5 cuboctahedra, edges with two equivalent Fe(2)U2Fe3Si2Ni5 cuboctahedra, edges with two equivalent Ni(3)U2Fe4Si2Ni4 cuboctahedra, edges with two equivalent Ni(4)U2Fe4Si2Ni4 cuboctahedra, faces with two equivalent Ni(3)U2Fe4Si2Ni4 cuboctahedra, faces with two equivalent Ni(4)U2Fe4Si2Ni4 cuboctahedra, faces with two equivalent Ni(2)U2Fe6Si2Ni2 cuboctahedra, faces with four equivalent Fe(1)U2Fe3Si2Ni5 cuboctahedra, and faces with four equivalent Fe(2)U2Fe3Si2Ni5 cuboctahedra. There are four inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 10-coordinate geometry to one U(1), one Fe(3), two equivalent Fe(1), two equivalent Fe(2), one Ni(1), one Ni(2), one Ni(3), and one Ni(4) atom. In the second Ni site, Ni(2) is bonded to two equivalent U(1), two equivalent Fe(1), two equivalent Fe(2), two equivalent Fe(3), two equivalent Ni(1), and two equivalent Si(1) atoms to form distorted NiU2Fe6Si2Ni2 cuboctahedra that share corners with two equivalent Fe(3)U2Fe4Si2Ni4 cuboctahedra, corners with two equivalent Ni(3)U2Fe4Si2Ni4 cuboctahedra, corners with two equivalent Ni(4)U2Fe4Si2Ni4 cuboctahedra, corners with four equivalent Fe(1)U2Fe3Si2Ni5 cuboctahedra, corners with four equivalent Fe(2)U2Fe3Si2Ni5 cuboctahedra, corners with four equivalent Ni(2)U2Fe6Si2Ni2 cuboctahedra, edges with two equivalent Fe(1)U2Fe3Si2Ni5 cuboctahedra, edges with two equivalent Fe(2)U2Fe3Si2Ni5 cuboctahedra, edges with two equivalent Ni(3)U2Fe4Si2Ni4 cuboctahedra, edges with two equivalent Ni(4)U2Fe4Si2Ni4 cuboctahedra, faces with two equivalent Fe(3)U2Fe4Si2Ni4 cuboctahedra, faces with two equivalent Ni(3)U2Fe4Si2Ni4 cuboctahedra, faces with two equivalent Ni(4)U2Fe4Si2Ni4 cuboctahedra, faces with four equivalent Fe(1)U2Fe3Si2Ni5 cuboctahedra, and faces with four equivalent Fe(2)U2Fe3Si2Ni5 cuboctahedra. In the third Ni site, Ni(3) is bonded to two equivalent U(1), two equivalent Fe(1), two equivalent Fe(2), two equivalent Ni(1), two equivalent Ni(4), and two equivalent Si(1) atoms to form distorted NiU2Fe4Si2Ni4 cuboctahedra that share corners with two equivalent Fe(3)U2Fe4Si2Ni4 cuboctahedra, corners with two equivalent Ni(4)U2Fe4Si2Ni4 cuboctahedra, corners with two equivalent Ni(2)U2Fe6Si2Ni2 cuboctahedra, corners with four equivalent Fe(1)U2Fe3Si2Ni5 cuboctahedra, corners with four equivalent Fe(2)U2Fe3Si2Ni5 cuboctahedra, corners with four equivalent Ni(3)U2Fe4Si2Ni4 cuboctahedra, edges with two equivalent Fe(1)U2Fe3Si2Ni5 cuboctahedra, edges with two equivalent Fe(2)U2Fe3Si2Ni5 cuboctahedra, edges with two equivalent Fe(3)U2Fe4Si2Ni4 cuboctahedra, edges with two equivalent Ni(2)U2Fe6Si2Ni2 cuboctahedra, faces with two equivalent Fe(3)U2Fe4Si2Ni4 cuboctahedra, faces with two equivalent Ni(4)U2Fe4Si2Ni4 cuboctahedra, faces with two equivalent Ni(2)U2Fe6Si2Ni2 cuboctahedra, faces with four equivalent Fe(1)U2Fe3Si2Ni5 cuboctahedra, and faces with four equivalent Fe(2)U2Fe3Si2Ni5 cuboctahedra. In the fourth Ni site, Ni(4) is bonded to two equivalent U(1), two equivalent Fe(1), two equivalent Fe(2), two equivalent Ni(1), two equivalent Ni(3), and two equivalent Si(1) atoms to form distorted NiU2Fe4Si2Ni4 cuboctahedra that share corners with two equivalent Fe(3)U2Fe4Si2Ni4 cuboctahedra, corners with two equivalent Ni(3)U2Fe4Si2Ni4 cuboctahedra, corners with two equivalent Ni(2)U2Fe6Si2Ni2 cuboctahedra, corners with four equivalent Fe(1)U2Fe3Si2Ni5 cuboctahedra, corners with four equivalent Fe(2)U2Fe3Si2Ni5 cuboctahedra, corners with four equivalent Ni(4)U2Fe4Si2Ni4 cuboctahedra, edges with two equivalent Fe(1)U2Fe3Si2Ni5 cuboctahedra, edges with two equivalent Fe(2)U2Fe3Si2Ni5 cuboctahedra, edges with two equivalent Fe(3)U2Fe4Si2Ni4 cuboctahedra, edges with two equivalent Ni(2)U2Fe6Si2Ni2 cuboctahedra, faces with two equivalent Fe(3)U2Fe4Si2Ni4 cuboctahedra, faces with two equivalent Ni(3)U2Fe4Si2Ni4 cuboctahedra, faces with two equivalent Ni(2)U2Fe6Si2Ni2 cuboctahedra, faces with four equivalent Fe(1)U2Fe3Si2Ni5 cuboctahedra, and faces with four equivalent Fe(2)U2Fe3Si2Ni5 cuboctahedra. Si(1) is bonded in a 10-coordinate geometry to one U(1), one Fe(3), two equivalent Fe(1), two equivalent Fe(2), one Ni(2), one Ni(3), one Ni(4), and one Si(1) atom. is represented by the CIF file [CIF]
data_UFe5Si2Ni5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.837
_cell_length_b   6.238
_cell_length_c   6.296
_cell_angle_alpha   83.968
_cell_angle_beta   112.529
_cell_angle_gamma   111.808
_symmetry_Int_Tables_number   1
_cell_volume   162.781
_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
  U  U0  1  0.000  0.000  0.000  1.0
  Fe  Fe1  1  0.721  0.225  0.222  1.0
  Fe  Fe2  1  0.279  0.775  0.778  1.0
  Fe  Fe3  1  0.501  0.777  0.220  1.0
  Fe  Fe4  1  0.499  0.223  0.780  1.0
  Fe  Fe5  1  0.500  0.500  0.000  1.0
  Si  Si6  1  0.995  0.351  0.646  1.0
  Si  Si7  1  0.005  0.649  0.354  1.0
  Ni  Ni8  1  0.669  0.657  0.660  1.0
  Ni  Ni9  1  0.331  0.343  0.340  1.0
  Ni  Ni10  1  0.000  0.500  0.000  1.0
  Ni  Ni11  1  0.500  0.000  0.500  1.0
  Ni  Ni12  1  0.000  0.000  0.500  1.0
[/CIF]
.
The material structure described by UFe5Ni5Si2 crystallizes in the triclinic P-1 space group. U(1) is bonded in a 20-coordinate geometry to two equivalent Fe(3), four equivalent Fe(1), four equivalent Fe(2), two equivalent Ni(1), two equivalent Ni(2), two equivalent Ni(3), two equivalent Ni(4), and two equivalent Si(1) atoms. There are three inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to two equivalent U(1), one Fe(3), two equivalent Fe(2), one Ni(2), one Ni(3), one Ni(4), two equivalent Ni(1), and two equivalent Si(1) atoms to form distorted FeU2Fe3Si2Ni5 cuboctahedra that share corners with two equivalent Fe(3)U2Fe4Si2Ni4 cuboctahedra, corners with two equivalent Ni(3)U2Fe4Si2Ni4 cuboctahedra, corners with two equivalent Ni(4)U2Fe4Si2Ni4 cuboctahedra, corners with two equivalent Ni(2)U2Fe6Si2Ni2 cuboctahedra, corners with four equivalent Fe(2)U2Fe3Si2Ni5 cuboctahedra, corners with six equivalent Fe(1)U2Fe3Si2Ni5 cuboctahedra,  an edgeedge with one Fe(3)U2Fe4Si2Ni4 cuboctahedra,  an edgeedge with one Ni(3)U2Fe4Si2Ni4 cuboctahedra,  an edgeedge with one Ni(4)U2Fe4Si2Ni4 cuboctahedra,  an edgeedge with one Ni(2)U2Fe6Si2Ni2 cuboctahedra, edges with three equivalent Fe(1)U2Fe3Si2Ni5 cuboctahedra,  a faceface with one Fe(1)U2Fe3Si2Ni5 cuboctahedra, faces with two equivalent Fe(3)U2Fe4Si2Ni4 cuboctahedra, faces with two equivalent Ni(3)U2Fe4Si2Ni4 cuboctahedra, faces with two equivalent Ni(4)U2Fe4Si2Ni4 cuboctahedra, faces with two equivalent Ni(2)U2Fe6Si2Ni2 cuboctahedra, and faces with six equivalent Fe(2)U2Fe3Si2Ni5 cuboctahedra. In the second Fe site, Fe(2) is bonded to two equivalent U(1), one Fe(3), two equivalent Fe(1), one Ni(2), one Ni(3), one Ni(4), two equivalent Ni(1), and two equivalent Si(1) atoms to form distorted FeU2Fe3Si2Ni5 cuboctahedra that share corners with two equivalent Fe(3)U2Fe4Si2Ni4 cuboctahedra, corners with two equivalent Ni(3)U2Fe4Si2Ni4 cuboctahedra, corners with two equivalent Ni(4)U2Fe4Si2Ni4 cuboctahedra, corners with two equivalent Ni(2)U2Fe6Si2Ni2 cuboctahedra, corners with four equivalent Fe(1)U2Fe3Si2Ni5 cuboctahedra, corners with six equivalent Fe(2)U2Fe3Si2Ni5 cuboctahedra,  an edgeedge with one Fe(3)U2Fe4Si2Ni4 cuboctahedra,  an edgeedge with one Ni(3)U2Fe4Si2Ni4 cuboctahedra,  an edgeedge with one Ni(4)U2Fe4Si2Ni4 cuboctahedra,  an edgeedge with one Ni(2)U2Fe6Si2Ni2 cuboctahedra, edges with three equivalent Fe(2)U2Fe3Si2Ni5 cuboctahedra,  a faceface with one Fe(2)U2Fe3Si2Ni5 cuboctahedra, faces with two equivalent Fe(3)U2Fe4Si2Ni4 cuboctahedra, faces with two equivalent Ni(3)U2Fe4Si2Ni4 cuboctahedra, faces with two equivalent Ni(4)U2Fe4Si2Ni4 cuboctahedra, faces with two equivalent Ni(2)U2Fe6Si2Ni2 cuboctahedra, and faces with six equivalent Fe(1)U2Fe3Si2Ni5 cuboctahedra. In the third Fe site, Fe(3) is bonded to two equivalent U(1), two equivalent Fe(1), two equivalent Fe(2), two equivalent Ni(1), two equivalent Ni(2), and two equivalent Si(1) atoms to form distorted FeU2Fe4Si2Ni4 cuboctahedra that share corners with two equivalent Ni(3)U2Fe4Si2Ni4 cuboctahedra, corners with two equivalent Ni(4)U2Fe4Si2Ni4 cuboctahedra, corners with two equivalent Ni(2)U2Fe6Si2Ni2 cuboctahedra, corners with four equivalent Fe(1)U2Fe3Si2Ni5 cuboctahedra, corners with four equivalent Fe(2)U2Fe3Si2Ni5 cuboctahedra, corners with four equivalent Fe(3)U2Fe4Si2Ni4 cuboctahedra, edges with two equivalent Fe(1)U2Fe3Si2Ni5 cuboctahedra, edges with two equivalent Fe(2)U2Fe3Si2Ni5 cuboctahedra, edges with two equivalent Ni(3)U2Fe4Si2Ni4 cuboctahedra, edges with two equivalent Ni(4)U2Fe4Si2Ni4 cuboctahedra, faces with two equivalent Ni(3)U2Fe4Si2Ni4 cuboctahedra, faces with two equivalent Ni(4)U2Fe4Si2Ni4 cuboctahedra, faces with two equivalent Ni(2)U2Fe6Si2Ni2 cuboctahedra, faces with four equivalent Fe(1)U2Fe3Si2Ni5 cuboctahedra, and faces with four equivalent Fe(2)U2Fe3Si2Ni5 cuboctahedra. There are four inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 10-coordinate geometry to one U(1), one Fe(3), two equivalent Fe(1), two equivalent Fe(2), one Ni(1), one Ni(2), one Ni(3), and one Ni(4) atom. In the second Ni site, Ni(2) is bonded to two equivalent U(1), two equivalent Fe(1), two equivalent Fe(2), two equivalent Fe(3), two equivalent Ni(1), and two equivalent Si(1) atoms to form distorted NiU2Fe6Si2Ni2 cuboctahedra that share corners with two equivalent Fe(3)U2Fe4Si2Ni4 cuboctahedra, corners with two equivalent Ni(3)U2Fe4Si2Ni4 cuboctahedra, corners with two equivalent Ni(4)U2Fe4Si2Ni4 cuboctahedra, corners with four equivalent Fe(1)U2Fe3Si2Ni5 cuboctahedra, corners with four equivalent Fe(2)U2Fe3Si2Ni5 cuboctahedra, corners with four equivalent Ni(2)U2Fe6Si2Ni2 cuboctahedra, edges with two equivalent Fe(1)U2Fe3Si2Ni5 cuboctahedra, edges with two equivalent Fe(2)U2Fe3Si2Ni5 cuboctahedra, edges with two equivalent Ni(3)U2Fe4Si2Ni4 cuboctahedra, edges with two equivalent Ni(4)U2Fe4Si2Ni4 cuboctahedra, faces with two equivalent Fe(3)U2Fe4Si2Ni4 cuboctahedra, faces with two equivalent Ni(3)U2Fe4Si2Ni4 cuboctahedra, faces with two equivalent Ni(4)U2Fe4Si2Ni4 cuboctahedra, faces with four equivalent Fe(1)U2Fe3Si2Ni5 cuboctahedra, and faces with four equivalent Fe(2)U2Fe3Si2Ni5 cuboctahedra. In the third Ni site, Ni(3) is bonded to two equivalent U(1), two equivalent Fe(1), two equivalent Fe(2), two equivalent Ni(1), two equivalent Ni(4), and two equivalent Si(1) atoms to form distorted NiU2Fe4Si2Ni4 cuboctahedra that share corners with two equivalent Fe(3)U2Fe4Si2Ni4 cuboctahedra, corners with two equivalent Ni(4)U2Fe4Si2Ni4 cuboctahedra, corners with two equivalent Ni(2)U2Fe6Si2Ni2 cuboctahedra, corners with four equivalent Fe(1)U2Fe3Si2Ni5 cuboctahedra, corners with four equivalent Fe(2)U2Fe3Si2Ni5 cuboctahedra, corners with four equivalent Ni(3)U2Fe4Si2Ni4 cuboctahedra, edges with two equivalent Fe(1)U2Fe3Si2Ni5 cuboctahedra, edges with two equivalent Fe(2)U2Fe3Si2Ni5 cuboctahedra, edges with two equivalent Fe(3)U2Fe4Si2Ni4 cuboctahedra, edges with two equivalent Ni(2)U2Fe6Si2Ni2 cuboctahedra, faces with two equivalent Fe(3)U2Fe4Si2Ni4 cuboctahedra, faces with two equivalent Ni(4)U2Fe4Si2Ni4 cuboctahedra, faces with two equivalent Ni(2)U2Fe6Si2Ni2 cuboctahedra, faces with four equivalent Fe(1)U2Fe3Si2Ni5 cuboctahedra, and faces with four equivalent Fe(2)U2Fe3Si2Ni5 cuboctahedra. In the fourth Ni site, Ni(4) is bonded to two equivalent U(1), two equivalent Fe(1), two equivalent Fe(2), two equivalent Ni(1), two equivalent Ni(3), and two equivalent Si(1) atoms to form distorted NiU2Fe4Si2Ni4 cuboctahedra that share corners with two equivalent Fe(3)U2Fe4Si2Ni4 cuboctahedra, corners with two equivalent Ni(3)U2Fe4Si2Ni4 cuboctahedra, corners with two equivalent Ni(2)U2Fe6Si2Ni2 cuboctahedra, corners with four equivalent Fe(1)U2Fe3Si2Ni5 cuboctahedra, corners with four equivalent Fe(2)U2Fe3Si2Ni5 cuboctahedra, corners with four equivalent Ni(4)U2Fe4Si2Ni4 cuboctahedra, edges with two equivalent Fe(1)U2Fe3Si2Ni5 cuboctahedra, edges with two equivalent Fe(2)U2Fe3Si2Ni5 cuboctahedra, edges with two equivalent Fe(3)U2Fe4Si2Ni4 cuboctahedra, edges with two equivalent Ni(2)U2Fe6Si2Ni2 cuboctahedra, faces with two equivalent Fe(3)U2Fe4Si2Ni4 cuboctahedra, faces with two equivalent Ni(3)U2Fe4Si2Ni4 cuboctahedra, faces with two equivalent Ni(2)U2Fe6Si2Ni2 cuboctahedra, faces with four equivalent Fe(1)U2Fe3Si2Ni5 cuboctahedra, and faces with four equivalent Fe(2)U2Fe3Si2Ni5 cuboctahedra. Si(1) is bonded in a 10-coordinate geometry to one U(1), one Fe(3), two equivalent Fe(1), two equivalent Fe(2), one Ni(2), one Ni(3), one Ni(4), and one Si(1) atom. is represented by the CIF file [CIF]
data_UFe5Si2Ni5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.837
_cell_length_b   6.238
_cell_length_c   6.296
_cell_angle_alpha   83.968
_cell_angle_beta   112.529
_cell_angle_gamma   111.808
_symmetry_Int_Tables_number   1
_cell_volume   162.781
_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
  U  U0  1  0.000  0.000  0.000  1.0
  Fe  Fe1  1  0.721  0.225  0.222  1.0
  Fe  Fe2  1  0.279  0.775  0.778  1.0
  Fe  Fe3  1  0.501  0.777  0.220  1.0
  Fe  Fe4  1  0.499  0.223  0.780  1.0
  Fe  Fe5  1  0.500  0.500  0.000  1.0
  Si  Si6  1  0.995  0.351  0.646  1.0
  Si  Si7  1  0.005  0.649  0.354  1.0
  Ni  Ni8  1  0.669  0.657  0.660  1.0
  Ni  Ni9  1  0.331  0.343  0.340  1.0
  Ni  Ni10  1  0.000  0.500  0.000  1.0
  Ni  Ni11  1  0.500  0.000  0.500  1.0
  Ni  Ni12  1  0.000  0.000  0.500  1.0
[/CIF]
.