data_Si3Os
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.39
_cell_length_b   4.39
_cell_length_c   2.93
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   109.82
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Si3Os
_chemical_formula_sum   'Si3 Os1'
_cell_volume   53.06
_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
  Si  Si1  1  0.26  0.2  0.47  1.0
  Si  Si2  1  0.26  0.8  0.47  1.0
  Si  Si3  1  0.0  0.0  0.0  1.0
  Os  Os0  1  0.52  0.0  0.0  1.0

data_Si3Os
_symmetry_space_group_name_H-M   P1
_cell_length_a   2.93
_cell_length_b   4.39
_cell_length_c   4.39
_cell_angle_alpha   109.82
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Si3Os
_chemical_formula_sum   'Si3 Os1'
_cell_volume   53.06
_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
  Si  Si0  1  0.0  0.0  0.0  1.0
  Si  Si1  1  0.47  0.26  0.2  1.0
  Si  Si2  1  0.47  0.26  0.8  1.0
  Os  Os3  1  0.0  0.52  0.0  1.0

Si Si Si Os
Si Si Si Os 0 2 o o o 0 2 o o + 0 3 o o o 0 3 o o + 0 1 o - o 1 2 o + o 1 2 o + + 1 3 o + o 1 3 o + + 2 3 - o o 2 3 o o o 
OsSi3 crystallizes in the triclinic P1 space group. Os(1) is bonded in a 6-coordinate geometry to two equivalent Si(1), two equivalent Si(2), and two equivalent Si(3) atoms. There is one shorter (2.16 Å) and one longer (2.30 Å) Os(1)-Si(1) bond length. There is one shorter (1.81 Å) and one longer (1.97 Å) Os(1)-Si(2) bond length. There is one shorter (2.10 Å) and one longer (2.29 Å) Os(1)-Si(3) bond length. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded in a 6-coordinate geometry to two equivalent Os(1), two equivalent Si(2), and two equivalent Si(3) atoms. There is one shorter (1.80 Å) and one longer (2.59 Å) Si(1)-Si(2) bond length. There is one shorter (1.81 Å) and one longer (1.97 Å) Si(1)-Si(3) bond length. In the second Si site, Si(2) is bonded in a 3-coordinate geometry to two equivalent Os(1), two equivalent Si(1), and two equivalent Si(3) atoms. There is one shorter (2.16 Å) and one longer (2.30 Å) Si(2)-Si(3) bond length. In the third Si site, Si(3) is bonded in a 6-coordinate geometry to two equivalent Os(1), two equivalent Si(1), and two equivalent Si(2) atoms.