data_Co5Ni
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.17
_cell_length_b   4.17
_cell_length_c   3.94
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Co5Ni
_chemical_formula_sum   'Co5 Ni1'
_cell_volume   59.39
_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
  Co  Co0  1  0.61  0.41  0.97  1.0
  Co  Co1  1  0.78  0.0  0.97  1.0
  Co  Co2  1  0.7  0.21  0.97  1.0
  Co  Co3  1  0.0  0.41  0.0  1.0
  Co  Co4  1  0.09  0.2  0.0  1.0
  Ni  Ni5  1  0.0  0.0  0.0  1.0

data_Co5Ni
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.94
_cell_length_b   4.17
_cell_length_c   4.17
_cell_angle_alpha   120.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Co5Ni
_chemical_formula_sum   'Co5 Ni1'
_cell_volume   59.39
_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
  Co  Co0  1  -0.0  0.09  0.21  1.0
  Co  Co1  1  0.0  0.0  0.41  1.0
  Co  Co2  1  0.97  0.61  0.41  1.0
  Co  Co3  1  0.97  0.7  0.21  1.0
  Co  Co4  1  0.97  0.78  0.0  1.0
  Ni  Ni5  1  0.0  0.0  0.0  1.0

Co Co Co Co Co Ni
Co Co Co Co Co Ni 0 2 o o o 1 2 o o o 1 5 + o + 1 4 + o + 2 3 + o + 3 4 o o o 4 5 o o o 
Co5Ni is Hg_xSn structured and crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of one Co5Ni cluster. There are five inequivalent Co sites. In the first Co site, Co(1) is bonded in a 1-coordinate geometry to one Co(3) atom. The Co(1)-Co(3) bond length is 1.08 Å. In the second Co site, Co(2) is bonded in a 1-coordinate geometry to one Co(3) and one Ni(1) atom. The Co(2)-Co(3) bond length is 1.08 Å. The Co(2)-Ni(1) bond length is 0.92 Å. In the third Co site, Co(3) is bonded in a T-shaped geometry to one Co(1), one Co(2), and one Co(4) atom. The Co(3)-Co(4) bond length is 1.13 Å. In the fourth Co site, Co(4) is bonded in a distorted L-shaped geometry to one Co(3) and one Co(5) atom. The Co(4)-Co(5) bond length is 1.08 Å. In the fifth Co site, Co(5) is bonded in a 1-coordinate geometry to one Co(4) and one Ni(1) atom. The Co(5)-Ni(1) bond length is 0.74 Å. Ni(1) is bonded in an L-shaped geometry to one Co(2) and one Co(5) atom.