data_SrHfGa2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.45
_cell_length_b   5.45
_cell_length_c   5.45
_cell_angle_alpha   129.48
_cell_angle_beta   129.48
_cell_angle_gamma   74.24
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SrHfGa2
_chemical_formula_sum   'Sr1 Hf1 Ga2'
_cell_volume   93.88
_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  Sr3  1  0.0  0.0  0.0  1.0
  Hf  Hf2  1  0.0  0.0  0.34  1.0
  Ga  Ga0  1  0.32  0.0  0.17  1.0
  Ga  Ga1  1  0.0  0.32  0.17  1.0

data_SrHfGa2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.57
_cell_length_b   6.57
_cell_length_c   5.45
_cell_angle_alpha   90.0
_cell_angle_beta   127.12
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   SrHfGa2
_chemical_formula_sum   'Sr2 Hf2 Ga4'
_cell_volume   187.76
_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
  Hf  Hf1  2  0.0  0.0  0.34  1.0
  Ga  Ga2  4  0.34  0.34  0.85  1.0

Sr Hf Ga Ga
Sr Hf Ga Ga 0 3 o o o 0 2 o o o 0 1 o o o 
SrHfGa2 is Copper structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two SrHfGa2 clusters. Sr(1) is bonded in a distorted water-like geometry to one Hf(1) and two equivalent Ga(1) atoms. The Sr(1)-Hf(1) bond length is 1.87 Å. Both Sr(1)-Ga(1) bond lengths are 1.38 Å. Hf(1) is bonded in a 1-coordinate geometry to one Sr(1) atom. Ga(1) is bonded in a single-bond geometry to one Sr(1) atom.