data_SiAs5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.77
_cell_length_b   5.77
_cell_length_c   7.43
_cell_angle_alpha   109.58
_cell_angle_beta   109.58
_cell_angle_gamma   34.53
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SiAs5
_chemical_formula_sum   'Si1 As5'
_cell_volume   131.43
_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
  Si  Si5  1  0.67  0.0  0.82  1.0
  As  As0  1  0.36  0.0  0.1  1.0
  As  As1  1  0.42  0.0  0.74  1.0
  As  As2  1  0.1  0.0  0.49  1.0
  As  As3  1  0.9  0.0  0.81  1.0
  As  As4  1  0.56  0.0  0.06  1.0

data_SiAs5
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.43
_cell_length_b   5.77
_cell_length_c   7.43
_cell_angle_alpha   109.58
_cell_angle_beta   90.0
_cell_angle_gamma   107.26
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SiAs5
_chemical_formula_sum   'Si1 As5'
_cell_volume   131.43
_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
  Si  Si0  1  0.0  0.33  0.18  1.0
  As  As1  1  0.0  0.1  0.19  1.0
  As  As2  1  0.0  0.44  0.94  1.0
  As  As3  1  0.0  0.58  0.26  1.0
  As  As4  1  0.0  0.64  0.9  1.0
  As  As5  1  0.0  0.9  0.51  1.0

Si As As As As As