data_Ag2As
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.8
_cell_length_b   6.8
_cell_length_c   6.8
_cell_angle_alpha   155.14
_cell_angle_beta   155.14
_cell_angle_gamma   35.45
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ag2As
_chemical_formula_sum   'Ag2 As1'
_cell_volume   55.4
_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
  Ag  Ag0  1  0.0  0.0  0.65  1.0
  Ag  Ag1  1  0.0  0.0  0.3  1.0
  As  As2  1  0.0  0.0  0.0  1.0

data_Ag2As
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.14
_cell_length_b   4.14
_cell_length_c   6.8
_cell_angle_alpha   90.0
_cell_angle_beta   107.72
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Ag2As
_chemical_formula_sum   'Ag4 As2'
_cell_volume   110.8
_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
  Ag  Ag0  2  0.0  0.0  0.35  1.0
  Ag  Ag1  2  0.0  0.0  0.7  1.0
  As  As2  2  0.0  0.0  0.0  1.0

Ag Ag As