data_Li2Zn
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.17
_cell_length_b   5.17
_cell_length_c   5.17
_cell_angle_alpha   103.62
_cell_angle_beta   103.62
_cell_angle_gamma   121.94
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Li2Zn
_chemical_formula_sum   'Li4 Zn2'
_cell_volume   102.76
_cell_formula_units_Z   2
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  Li0  1  0.0  0.19  0.51  1.0
  Li  Li1  1  0.19  0.0  0.0  1.0
  Li  Li2  1  0.0  0.2  0.0  1.0
  Li  Li3  1  0.19  1.0  0.51  1.0
  Zn  Zn4  1  0.0  0.0  0.26  1.0
  Zn  Zn5  1  0.0  0.0  0.77  1.0

data_Li2Zn
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.02
_cell_length_b   9.05
_cell_length_c   5.17
_cell_angle_alpha   90.0
_cell_angle_beta   119.03
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Li2Zn
_chemical_formula_sum   'Li8 Zn4'
_cell_volume   205.52
_cell_formula_units_Z   4
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  4  0.4  0.4  0.49  1.0
  Li  Li1  4  0.4  0.4  0.0  1.0
  Zn  Zn2  2  0.0  0.0  0.23  1.0
  Zn  Zn3  2  0.0  0.0  0.74  1.0

Li Li Li Li Zn Zn