data_MnIr
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.34
_cell_length_b   4.34
_cell_length_c   4.34
_cell_angle_alpha   57.78
_cell_angle_beta   57.78
_cell_angle_gamma   57.78
_symmetry_Int_Tables_number   1
_chemical_formula_structural   MnIr
_chemical_formula_sum   'Mn2 Ir2'
_cell_volume   54.69
_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
  Mn  Mn2  1  0.0  0.0  0.15  1.0
  Mn  Mn3  1  0.0  0.0  0.65  1.0
  Ir  Ir0  1  0.0  0.0  0.63  1.0
  Ir  Ir1  1  0.0  0.0  0.17  1.0

data_MnIr
_symmetry_space_group_name_H-M   C2/m
_cell_length_a   7.26
_cell_length_b   4.19
_cell_length_c   4.34
_cell_angle_alpha   90.0
_cell_angle_beta   123.91
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   12
_chemical_formula_structural   MnIr
_chemical_formula_sum   'Mn4 Ir4'
_cell_volume   109.38
_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, y, -z'
  4  'x, -y, z'
  5  'x+1/2, y+1/2, z'
  6  '-x+1/2, -y+1/2, -z'
  7  '-x+1/2, y+1/2, -z'
  8  '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
  Mn  Mn0  4  -0.0  0.0  0.25  1.0
  Ir  Ir1  4  0.0  0.0  0.23  1.0

Mn Mn Ir Ir
Ir Mn 0 1 o o o 0 1 - o o 0 1 + o o 1 1 + o o 