data_Li2FeAs
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.78
_cell_length_b   8.78
_cell_length_c   8.78
_cell_angle_alpha   17.7
_cell_angle_beta   17.7
_cell_angle_gamma   17.7
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Li2FeAs
_chemical_formula_sum   'Li2 Fe1 As1'
_cell_volume   54.65
_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
  Li  Li2  1  0.0  0.0  0.44  1.0
  Li  Li3  1  0.0  0.0  0.49  1.0
  Fe  Fe1  1  0.0  0.0  0.0  1.0
  As  As0  1  0.0  0.0  0.96  1.0

data_Li2FeAs
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.68
_cell_length_b   2.7
_cell_length_c   8.78
_cell_angle_alpha   90.0
_cell_angle_beta   100.23
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Li2FeAs
_chemical_formula_sum   'Li4 Fe2 As2'
_cell_volume   109.3
_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
  Li  Li0  2  0.0  0.0  0.51  1.0
  Li  Li1  2  0.0  0.0  0.56  1.0
  Fe  Fe2  2  0.0  0.0  0.0  1.0
  As  As3  2  -0.0  0.0  0.04  1.0

Li Li Fe As
Li Li Fe As 0 1 o o o 2 3 o o - 