data_NaSi2As
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.92
_cell_length_b   5.92
_cell_length_c   2.78
_cell_angle_alpha   101.78
_cell_angle_beta   101.78
_cell_angle_gamma   124.53
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NaSi2As
_chemical_formula_sum   'Na1 Si2 As1'
_cell_volume   72.08
_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
  Na  Na1  1  0.0  0.0  0.0  1.0
  Si  Si2  1  0.38  0.62  0.0  1.0
  Si  Si3  1  0.38  0.38  0.0  1.0
  As  As0  1  0.75  0.0  0.0  1.0

data_NaSi2As
_symmetry_space_group_name_H-M   P1
_cell_length_a   2.78
_cell_length_b   4.96
_cell_length_c   5.92
_cell_angle_alpha   113.71
_cell_angle_beta   101.78
_cell_angle_gamma   94.2
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NaSi2As
_chemical_formula_sum   'Na1 Si2 As1'
_cell_volume   72.08
_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
  Na  Na0  1  0.0  0.0  0.0  1.0
  Si  Si1  1  0.38  0.38  0.76  1.0
  Si  Si2  1  0.62  0.62  1.0  1.0
  As  As3  1  0.0  0.0  0.75  1.0

Na Si Si As