data_SiGe
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.93
_cell_length_b   5.93
_cell_length_c   6.72
_cell_angle_alpha   106.19
_cell_angle_beta   106.19
_cell_angle_gamma   27.29
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SiGe
_chemical_formula_sum   'Si3 Ge3'
_cell_volume   103.87
_cell_formula_units_Z   3
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  Si3  1  0.66  0.0  0.23  1.0
  Si  Si4  1  0.91  0.0  0.53  1.0
  Si  Si5  1  0.22  0.0  0.44  1.0
  Ge  Ge0  1  0.43  0.0  0.41  1.0
  Ge  Ge1  1  0.08  0.0  0.13  1.0
  Ge  Ge2  1  0.77  0.0  0.66  1.0

data_SiGe
_symmetry_space_group_name_H-M   P1
_cell_length_a   2.8
_cell_length_b   5.93
_cell_length_c   6.72
_cell_angle_alpha   106.19
_cell_angle_beta   90.0
_cell_angle_gamma   103.64
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SiGe
_chemical_formula_sum   'Si3 Ge3'
_cell_volume   103.87
_cell_formula_units_Z   3
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  0.09  0.47  1.0
  Si  Si1  1  0.0  0.34  0.77  1.0
  Si  Si2  1  0.0  0.78  0.56  1.0
  Ge  Ge3  1  0.0  0.23  0.34  1.0
  Ge  Ge4  1  0.0  0.57  0.59  1.0
  Ge  Ge5  1  0.0  0.92  0.87  1.0

Si Si Si Ge Ge Ge