data_Na2ZrZn
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.29
_cell_length_b   6.29
_cell_length_c   6.29
_cell_angle_alpha   141.77
_cell_angle_beta   141.77
_cell_angle_gamma   55.18
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Na2ZrZn
_chemical_formula_sum   'Na2 Zr1 Zn1'
_cell_volume   94.43
_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  0.06  0.79  1.0
  Na  Na1  1  0.06  0.0  0.79  1.0
  Zr  Zr3  1  0.0  0.0  0.57  1.0
  Zn  Zn2  1  0.0  0.0  0.0  1.0

data_Na2ZrZn
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.82
_cell_length_b   5.82
_cell_length_c   6.29
_cell_angle_alpha   90.0
_cell_angle_beta   117.59
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Na2ZrZn
_chemical_formula_sum   'Na4 Zr2 Zn2'
_cell_volume   188.86
_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
  Na  Na0  4  0.26  0.47  0.73  1.0
  Zr  Zr1  2  0.07  0.5  0.57  1.0
  Zn  Zn2  2  0.0  0.0  0.0  1.0

Na Na Zr Zn