data_Eu3Si4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.65
_cell_length_b   9.65
_cell_length_c   9.65
_cell_angle_alpha   156.27
_cell_angle_beta   36.51
_cell_angle_gamma   152.66
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Eu3Si4
_chemical_formula_sum   'Eu3 Si4'
_cell_volume   165.66
_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
  Eu  Eu0  1  0.0  0.0  0.02  1.0
  Eu  Eu1  1  0.98  0.39  0.01  1.0
  Eu  Eu2  1  0.0  0.77  0.29  1.0
  Si  Si3  1  0.98  0.63  1.0  1.0
  Si  Si4  1  0.0  0.53  0.27  1.0
  Si  Si5  1  0.0  0.35  0.09  1.0
  Si  Si6  1  0.0  0.98  0.09  1.0

data_Eu3Si4
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.97
_cell_length_b   4.56
_cell_length_c   9.65
_cell_angle_alpha   103.67
_cell_angle_beta   101.86
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Eu3Si4
_chemical_formula_sum   'Eu3 Si4'
_cell_volume   165.66
_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
  Eu  Eu0  1  0.0  0.98  0.98  1.0
  Eu  Eu1  1  0.4  0.38  0.4  1.0
  Eu  Eu2  1  0.77  0.49  0.49  1.0
  Si  Si3  1  0.35  0.26  0.26  1.0
  Si  Si4  1  0.53  0.26  0.26  1.0
  Si  Si5  1  0.64  0.63  0.65  1.0
  Si  Si6  1  0.98  0.89  0.89  1.0

Eu Eu Eu Si Si Si Si
Eu Eu Eu Si Si Si Si 0 6 o - o 1 2 + o o 1 4 + o o 1 5 + o o 2 3 - o - 4 5 o o o 