data_Ga3Si
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.88
_cell_length_b   2.88
_cell_length_c   9.78
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ga3Si
_chemical_formula_sum   'Ga3 Si1'
_cell_volume   70.22
_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
  Ga  Ga0  1  1.0  0.66  0.36  1.0
  Ga  Ga1  1  1.0  0.66  0.42  1.0
  Ga  Ga2  1  0.0  0.0  0.89  1.0
  Si  Si3  1  0.0  0.0  0.0  1.0

data_Ga3Si
_symmetry_space_group_name_H-M   Cm
_cell_length_a   2.88
_cell_length_b   4.99
_cell_length_c   9.78
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Ga3Si
_chemical_formula_sum   'Ga6 Si2'
_cell_volume   140.43
_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
  Ga  Ga0  2  0.0  0.0  0.89  1.0
  Ga  Ga1  2  0.16  0.5  0.36  1.0
  Ga  Ga2  2  0.16  0.5  0.42  1.0
  Si  Si3  2  0.0  0.0  0.0  1.0

Ga Ga Ga Si
Ga Ga Ga Si 0 1 o o o 2 3 o o + 
(Ga)2SiGa is alpha carbon monoxide-like structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two digallane molecules and two SiGa clusters. In each SiGa cluster, Ga(3) is bonded in a single-bond geometry to one Si(1) atom. The Ga(3)-Si(1) bond length is 1.10 Å. Si(1) is bonded in a single-bond geometry to one Ga(3) atom.