data_HgAsOs
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.5
_cell_length_b   4.5
_cell_length_c   4.5
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   HgAsOs
_chemical_formula_sum   'Hg1 As1 Os1'
_cell_volume   64.35
_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
  Hg  Hg1  1  0.59  0.59  0.59  1.0
  As  As0  1  0.0  0.0  0.0  1.0
  Os  Os2  1  0.18  0.18  0.18  1.0

data_HgAsOs
_symmetry_space_group_name_H-M   R3m
_cell_length_a   4.5
_cell_length_b   4.5
_cell_length_c   11.02
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   HgAsOs
_chemical_formula_sum   'Hg3 As3 Os3'
_cell_volume   193.04
_cell_formula_units_Z   3
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-y, x-y, z'
  3  '-x+y, -x, z'
  4  '-y, -x, z'
  5  '-x+y, y, z'
  6  'x, x-y, z'
  7  'x+1/3, y+2/3, z+2/3'
  8  '-y+1/3, x-y+2/3, z+2/3'
  9  '-x+y+1/3, -x+2/3, z+2/3'
  10  '-y+1/3, -x+2/3, z+2/3'
  11  '-x+y+1/3, y+2/3, z+2/3'
  12  'x+1/3, x-y+2/3, z+2/3'
  13  'x+2/3, y+1/3, z+1/3'
  14  '-y+2/3, x-y+1/3, z+1/3'
  15  '-x+y+2/3, -x+1/3, z+1/3'
  16  '-y+2/3, -x+1/3, z+1/3'
  17  '-x+y+2/3, y+1/3, z+1/3'
  18  'x+2/3, x-y+1/3, z+1/3'
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
  Hg  Hg0  3  0.0  0.0  0.41  1.0
  As  As1  3  0.0  0.0  1.0  1.0
  Os  Os2  3  0.0  0.0  0.82  1.0

Hg As Os
OsHgAs crystallizes in the trigonal R3m space group. Os(1) is bonded to three equivalent Hg(1) and one As(1) atom to form distorted OsHg3As tetrahedra that share corners with three equivalent As(1)Hg3Os tetrahedra, corners with six equivalent Os(1)Hg3As tetrahedra, and edges with three equivalent As(1)Hg3Os tetrahedra. All Os(1)-Hg(1) bond lengths are 2.73 Å. The Os(1)-As(1) bond length is 1.99 Å. Hg(1) is bonded in a distorted hexagonal planar geometry to three equivalent Os(1) and three equivalent As(1) atoms. All Hg(1)-As(1) bond lengths are 2.73 Å. As(1) is bonded to one Os(1) and three equivalent Hg(1) atoms to form distorted AsHg3Os tetrahedra that share corners with three equivalent Os(1)Hg3As tetrahedra, corners with six equivalent As(1)Hg3Os tetrahedra, and edges with three equivalent Os(1)Hg3As tetrahedra.