data_NaSiAs2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.45
_cell_length_b   5.45
_cell_length_c   5.45
_cell_angle_alpha   142.57
_cell_angle_beta   118.68
_cell_angle_gamma   74.1
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NaSiAs2
_chemical_formula_sum   'Na1 Si1 As2'
_cell_volume   84.67
_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  Na2  1  0.0  0.0  0.0  1.0
  Si  Si3  1  0.0  0.0  0.35  1.0
  As  As0  1  0.75  0.0  0.63  1.0
  As  As1  1  0.0  0.78  0.72  1.0

data_NaSiAs2
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.5
_cell_length_b   5.45
_cell_length_c   5.45
_cell_angle_alpha   61.32
_cell_angle_beta   71.29
_cell_angle_gamma   71.29
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NaSiAs2
_chemical_formula_sum   'Na1 Si1 As2'
_cell_volume   84.67
_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  0.35  0.0  0.65  1.0
  As  As2  1  0.72  -0.0  0.06  1.0
  As  As3  1  0.88  0.75  0.37  1.0

Na Si As As