data_NiRu
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.9
_cell_length_b   4.9
_cell_length_c   4.19
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   149.38
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NiRu
_chemical_formula_sum   'Ni2 Ru2'
_cell_volume   51.19
_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
  Ni  Ni0  1  0.29  0.9  0.14  1.0
  Ni  Ni1  1  0.29  0.1  0.05  1.0
  Ru  Ru2  1  0.29  0.34  0.14  1.0
  Ru  Ru3  1  0.29  0.66  0.05  1.0

data_NiRu
_symmetry_space_group_name_H-M   P-1
_cell_length_a   2.59
_cell_length_b   4.19
_cell_length_c   4.9
_cell_angle_alpha   90.0
_cell_angle_beta   105.31
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   2
_chemical_formula_structural   NiRu
_chemical_formula_sum   'Ni2 Ru2'
_cell_volume   51.19
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-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
  Ni  Ni0  2  0.1  0.55  0.6  1.0
  Ru  Ru1  2  0.34  0.45  0.84  1.0

Ni Ni Ru Ru
RuNi crystallizes in the triclinic P-1 space group. The structure is zero-dimensional and consists of one RuNi cluster. Ru(1) is bonded in a distorted single-bond geometry to one Ni(1) atom. The Ru(1)-Ni(1) bond length is 1.22 Å. Ni(1) is bonded in a distorted bent 150 degrees geometry to one Ru(1) and one Ni(1) atom. The Ni(1)-Ni(1) bond length is 1.09 Å.