data_Be4Si5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.7
_cell_length_b   5.7
_cell_length_c   5.7
_cell_angle_alpha   95.64
_cell_angle_beta   95.64
_cell_angle_gamma   143.47
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Be4Si5
_chemical_formula_sum   'Be4 Si5'
_cell_volume   104.72
_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
  Be  Be0  1  0.0  0.92  0.0  1.0
  Be  Be1  1  0.0  0.74  0.0  1.0
  Be  Be2  1  0.74  0.0  0.0  1.0
  Be  Be3  1  0.92  0.0  0.0  1.0
  Si  Si4  1  0.0  0.0  0.0  1.0
  Si  Si5  1  0.68  0.32  0.79  1.0
  Si  Si6  1  0.32  0.68  0.79  1.0
  Si  Si7  1  0.5  0.5  0.0  1.0
  Si  Si8  1  0.32  0.32  0.79  1.0

data_Be4Si5
_symmetry_space_group_name_H-M   Cm
_cell_length_a   3.57
_cell_length_b   10.83
_cell_length_c   5.7
_cell_angle_alpha   90.0
_cell_angle_beta   108.27
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Be4Si5
_chemical_formula_sum   'Be8 Si10'
_cell_volume   209.44
_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
  Be  Be0  4  0.04  0.04  0.0  1.0
  Be  Be1  4  0.13  0.13  0.0  1.0
  Si  Si2  4  0.29  0.18  0.79  1.0
  Si  Si3  2  0.0  0.0  0.0  1.0
  Si  Si4  2  0.46  0.0  0.79  1.0
  Si  Si5  2  0.5  0.0  0.0  1.0

Be Be Be Be Si Si Si Si Si