data_BaSrSi2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.61
_cell_length_b   3.61
_cell_length_c   9.34
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   BaSrSi2
_chemical_formula_sum   'Ba1 Sr1 Si2'
_cell_volume   121.65
_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
  Ba  Ba0  1  0.8  0.8  0.75  1.0
  Sr  Sr3  1  0.0  0.0  0.86  1.0
  Si  Si1  1  0.0  0.0  0.77  1.0
  Si  Si2  1  0.8  0.8  0.63  1.0

data_BaSrSi2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.1
_cell_length_b   5.1
_cell_length_c   9.34
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   BaSrSi2
_chemical_formula_sum   'Ba2 Sr2 Si4'
_cell_volume   243.31
_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
  Ba  Ba0  2  0.3  0.5  0.75  1.0
  Sr  Sr1  2  0.0  0.0  0.86  1.0
  Si  Si2  2  0.0  0.0  0.77  1.0
  Si  Si3  2  0.3  0.5  0.63  1.0

Ba Sr Si Si
Ba Sr Si Si 0 3 o o o 0 2 + + o 1 2 o o o 