data_SiO
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.66
_cell_length_b   2.66
_cell_length_c   3.1
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SiO
_chemical_formula_sum   'Si1 O1'
_cell_volume   19.08
_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  0.33  0.77  0.55  1.0
  O  O0  1  0.0  0.0  0.0  1.0

data_SiO
_symmetry_space_group_name_H-M   P1
_cell_length_a   2.66
_cell_length_b   2.66
_cell_length_c   3.1
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SiO
_chemical_formula_sum   'Si1 O1'
_cell_volume   19.08
_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  0.33  0.77  0.55  1.0
  O  O1  1  0.0  0.0  0.0  1.0

Si O
Si O 0 1 o + o 0 1 o + + 0 1 o o o 0 1 o o + 0 1 + + o 0 1 + + + 
SiO is Tungsten Carbide structured and crystallizes in the triclinic P1 space group. Si(1) is bonded in a 5-coordinate geometry to six equivalent O(1) atoms. There are a spread of Si(1)-O(1) bond distances ranging from 1.91-2.47 Å. O(1) is bonded in a 6-coordinate geometry to six equivalent Si(1) atoms.