The crystal structure described by OsAs2 is zeta iron carbide structured and crystallizes in the orthorhombic Pnnm space group. Os(1) is bonded to six equivalent As(1) atoms to form OsAs6 octahedra that share corners with eight equivalent Os(1)As6 octahedra, corners with six equivalent As(1)AsOs3 tetrahedra, and edges with two equivalent Os(1)As6 octahedra. The corner-sharing octahedral tilt angles are 55°. As(1) is bonded to three equivalent Os(1) and one As(1) atom to form distorted AsAsOs3 tetrahedra that share corners with three equivalent Os(1)As6 octahedra, corners with thirteen equivalent As(1)AsOs3 tetrahedra, and  an edgeedge with one As(1)AsOs3 tetrahedra. The corner-sharing octahedral tilt angles range from 70-72°. is represented by the CIF file [CIF]
data_As2Os
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.043
_cell_length_b   5.419
_cell_length_c   6.210
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   102.414
_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
  As  As0  1  0.500  0.329  0.866  1.0
  As  As1  1  0.500  0.671  0.134  1.0
  As  As2  1  0.000  0.171  0.366  1.0
  As  As3  1  0.000  0.829  0.634  1.0
  Os  Os4  1  0.500  0.500  0.500  1.0
  Os  Os5  1  0.000  0.000  0.000  1.0
[/CIF]
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The crystal structure described by OsAs2 is zeta iron carbide structured and crystallizes in the orthorhombic Pnnm space group. Os(1) is bonded to six equivalent As(1) atoms to form OsAs6 octahedra that share corners with eight equivalent Os(1)As6 octahedra, corners with six equivalent As(1)AsOs3 tetrahedra, and edges with two equivalent Os(1)As6 octahedra. The corner-sharing octahedral tilt angles are 55°. As(1) is bonded to three equivalent Os(1) and one As(1) atom to form distorted AsAsOs3 tetrahedra that share corners with three equivalent Os(1)As6 octahedra, corners with thirteen equivalent As(1)AsOs3 tetrahedra, and  an edgeedge with one As(1)AsOs3 tetrahedra. The corner-sharing octahedral tilt angles range from 70-72°. is represented by the CIF file [CIF]
data_As2Os
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.043
_cell_length_b   5.419
_cell_length_c   6.210
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   102.414
_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
  As  As0  1  0.500  0.329  0.866  1.0
  As  As1  1  0.500  0.671  0.134  1.0
  As  As2  1  0.000  0.171  0.366  1.0
  As  As3  1  0.000  0.829  0.634  1.0
  Os  Os4  1  0.500  0.500  0.500  1.0
  Os  Os5  1  0.000  0.000  0.000  1.0
[/CIF]
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