The compound described by IrMnAl is half-Heusler structured and crystallizes in the cubic F-43m space group. Mn(1) is bonded to four equivalent Ir(1) atoms to form MnIr4 tetrahedra that share corners with four equivalent Al(1)Ir4 tetrahedra, corners with twelve equivalent Mn(1)Ir4 tetrahedra, and edges with six equivalent Al(1)Ir4 tetrahedra. Ir(1) is bonded in a body-centered cubic geometry to four equivalent Mn(1) and four equivalent Al(1) atoms. Al(1) is bonded to four equivalent Ir(1) atoms to form AlIr4 tetrahedra that share corners with four equivalent Mn(1)Ir4 tetrahedra, corners with twelve equivalent Al(1)Ir4 tetrahedra, and edges with six equivalent Mn(1)Ir4 tetrahedra. is represented by the CIF file [CIF]
data_MnAlIr
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.182
_cell_length_b   4.182
_cell_length_c   4.182
_cell_angle_alpha   60.000
_cell_angle_beta   60.000
_cell_angle_gamma   60.000
_symmetry_Int_Tables_number   1
_cell_volume   51.710
_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
  Mn  Mn0  1  0.250  0.250  0.250  1.0
  Al  Al1  1  0.750  0.750  0.750  1.0
  Ir  Ir2  1  0.000  0.000  0.000  1.0
[/CIF]
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The compound described by IrMnAl is half-Heusler structured and crystallizes in the cubic F-43m space group. Mn(1) is bonded to four equivalent Ir(1) atoms to form MnIr4 tetrahedra that share corners with four equivalent Al(1)Ir4 tetrahedra, corners with twelve equivalent Mn(1)Ir4 tetrahedra, and edges with six equivalent Al(1)Ir4 tetrahedra. Ir(1) is bonded in a body-centered cubic geometry to four equivalent Mn(1) and four equivalent Al(1) atoms. Al(1) is bonded to four equivalent Ir(1) atoms to form AlIr4 tetrahedra that share corners with four equivalent Mn(1)Ir4 tetrahedra, corners with twelve equivalent Al(1)Ir4 tetrahedra, and edges with six equivalent Mn(1)Ir4 tetrahedra. is represented by the CIF file [CIF]
data_MnAlIr
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.182
_cell_length_b   4.182
_cell_length_c   4.182
_cell_angle_alpha   60.000
_cell_angle_beta   60.000
_cell_angle_gamma   60.000
_symmetry_Int_Tables_number   1
_cell_volume   51.710
_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
  Mn  Mn0  1  0.250  0.250  0.250  1.0
  Al  Al1  1  0.750  0.750  0.750  1.0
  Ir  Ir2  1  0.000  0.000  0.000  1.0
[/CIF]
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