data_Sr(GaSb)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.77
_cell_length_b   7.77
_cell_length_c   7.77
_cell_angle_alpha   145.95
_cell_angle_beta   145.95
_cell_angle_gamma   48.92
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Sr(GaSb)2
_chemical_formula_sum   'Sr1 Ga2 Sb2'
_cell_volume   146.16
_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
  Sr  Sr4  1  0.0  0.0  0.0  1.0
  Ga  Ga0  1  0.0  0.27  0.53  1.0
  Ga  Ga1  1  0.27  0.0  0.53  1.0
  Sb  Sb2  1  0.0  0.0  0.66  1.0
  Sb  Sb3  1  0.0  0.0  0.48  1.0

data_Sr(GaSb)2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.43
_cell_length_b   6.43
_cell_length_c   7.77
_cell_angle_alpha   90.0
_cell_angle_beta   114.46
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Sr(GaSb)2
_chemical_formula_sum   'Sr2 Ga4 Sb4'
_cell_volume   292.31
_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
  Sr  Sr0  2  0.0  0.0  0.0  1.0
  Ga  Ga1  4  0.4  0.14  0.26  1.0
  Sb  Sb2  2  0.16  0.5  0.66  1.0
  Sb  Sb3  2  0.48  0.0  0.48  1.0

Sr Ga Ga Sb Sb
Sr Ga Ga Sb Sb 0 1 o o o 0 3 o o - 0 2 o o o 1 4 o o o 1 2 o o o 2 4 o o o 3 4 o o o 
Sr(GaSb)2 crystallizes in the monoclinic Cm space group. Sr(1) is bonded in a 5-coordinate geometry to four equivalent Ga(1) and one Sb(1) atom. There are two shorter (2.67 Å) and two longer (3.33 Å) Sr(1)-Ga(1) bond lengths. The Sr(1)-Sb(1) bond length is 2.66 Å. Ga(1) is bonded in a 4-coordinate geometry to two equivalent Sr(1), one Ga(1), and one Sb(2) atom. The Ga(1)-Ga(1) bond length is 1.76 Å. The Ga(1)-Sb(2) bond length is 1.78 Å. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a linear geometry to one Sr(1) and one Sb(2) atom. The Sb(1)-Sb(2) bond length is 1.39 Å. In the second Sb site, Sb(2) is bonded in a 3-coordinate geometry to two equivalent Ga(1) and one Sb(1) atom.