data_NiAs2Os
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.35
_cell_length_b   4.35
_cell_length_c   3.06
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NiAs2Os
_chemical_formula_sum   'Ni1 As2 Os1'
_cell_volume   57.89
_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
  Ni  Ni2  1  0.0  0.0  0.0  1.0
  As  As0  1  0.18  0.0  0.53  1.0
  As  As1  1  0.0  0.18  0.53  1.0
  Os  Os3  1  0.18  0.18  0.0  1.0

data_NiAs2Os
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.16
_cell_length_b   6.16
_cell_length_c   3.06
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   NiAs2Os
_chemical_formula_sum   'Ni2 As4 Os2'
_cell_volume   115.78
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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  0.0  0.0  0.0  1.0
  As  As1  4  0.09  0.09  0.53  1.0
  Os  Os2  2  0.18  0.0  0.0  1.0

Ni As As Os
NiOs(As)2 crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two diarsene molecules and two NiOs clusters. In each NiOs cluster, Os(1) is bonded in a single-bond geometry to one Ni(1) atom. The Os(1)-Ni(1) bond length is 1.09 Å. Ni(1) is bonded in a single-bond geometry to one Os(1) atom.