data_Sr2Si3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.55
_cell_length_b   5.96
_cell_length_c   9.59
_cell_angle_alpha   61.64
_cell_angle_beta   37.79
_cell_angle_gamma   80.57
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Sr2Si3
_chemical_formula_sum   'Sr4 Si6'
_cell_volume   242.24
_cell_formula_units_Z   2
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  Sr6  1  0.98  0.28  0.49  1.0
  Sr  Sr7  1  0.44  0.82  0.49  1.0
  Sr  Sr8  1  0.58  0.85  0.94  1.0
  Sr  Sr9  1  0.04  0.3  0.94  1.0
  Si  Si0  1  0.48  0.12  0.01  1.0
  Si  Si1  1  0.94  0.98  0.01  1.0
  Si  Si2  1  0.08  0.01  0.46  1.0
  Si  Si3  1  0.54  0.14  0.46  1.0
  Si  Si4  1  0.21  0.05  0.54  1.0
  Si  Si5  1  0.6  0.02  0.99  1.0

data_Sr2Si3
_symmetry_space_group_name_H-M   P1
_cell_length_a   5.78
_cell_length_b   5.96
_cell_length_c   8.55
_cell_angle_alpha   80.57
_cell_angle_beta   70.25
_cell_angle_gamma   60.98
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Sr2Si3
_chemical_formula_sum   'Sr4 Si6'
_cell_volume   242.24
_cell_formula_units_Z   2
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  Sr0  1  0.28  0.76  0.02  1.0
  Sr  Sr1  1  0.37  0.21  0.48  1.0
  Sr  Sr2  1  0.74  0.23  0.53  1.0
  Sr  Sr3  1  0.76  0.68  0.07  1.0
  Si  Si4  1  0.14  0.4  0.0  1.0
  Si  Si5  1  0.55  0.53  0.46  1.0
  Si  Si6  1  0.61  0.87  0.51  1.0
  Si  Si7  1  0.62  0.99  0.41  1.0
  Si  Si8  1  0.8  0.41  0.25  1.0
  Si  Si9  1  0.93  0.0  0.05  1.0

Sr Sr Sr Sr Si Si Si Si Si Si
Sr Sr Sr Sr Si Si Si Si Si Si 0 6 + o o 1 8 o + o 1 7 o + o 2 9 o + o 3 5 - - + 4 9 o o - 6 8 o o o 7 8 o o o 