The structure described by MgLa4Ir crystallizes in the cubic F-43m space group. Mg(1) is bonded to three equivalent Mg(1), three equivalent La(1), three equivalent La(2), and three equivalent La(3) atoms to form a mixture of face and corner-sharing MgLa9Mg3 cuboctahedra. There are three inequivalent La sites. In the first La site, La(1) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Mg(1) and two equivalent Ir(1) atoms. In the second La site, La(2) is bonded in a bent 150 degrees geometry to two equivalent Mg(1) and two equivalent Ir(1) atoms. In the third La site, La(3) is bonded in a 3-coordinate geometry to three equivalent Mg(1) and three equivalent Ir(1) atoms. Ir(1) is bonded in a 6-coordinate geometry to three equivalent La(1), three equivalent La(2), and three equivalent La(3) atoms. is represented by the CIF file [CIF]
data_La4MgIr
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.193
_cell_length_b   10.193
_cell_length_c   10.193
_cell_angle_alpha   60.000
_cell_angle_beta   60.000
_cell_angle_gamma   60.000
_symmetry_Int_Tables_number   1
_cell_volume   748.871
_cell_formula_units_Z   4
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
  La  La0  1  0.440  0.060  0.440  1.0
  La  La1  1  0.812  0.812  0.188  1.0
  La  La2  1  0.060  0.440  0.060  1.0
  La  La3  1  0.188  0.812  0.188  1.0
  La  La4  1  0.812  0.188  0.188  1.0
  La  La5  1  0.060  0.060  0.440  1.0
  La  La6  1  0.655  0.655  0.655  1.0
  La  La7  1  0.655  0.034  0.655  1.0
  La  La8  1  0.188  0.812  0.812  1.0
  La  La9  1  0.034  0.655  0.655  1.0
  La  La10  1  0.060  0.440  0.440  1.0
  La  La11  1  0.188  0.188  0.812  1.0
  La  La12  1  0.655  0.655  0.034  1.0
  La  La13  1  0.440  0.060  0.060  1.0
  La  La14  1  0.812  0.188  0.812  1.0
  La  La15  1  0.440  0.440  0.060  1.0
  Mg  Mg16  1  0.734  0.422  0.422  1.0
  Mg  Mg17  1  0.422  0.422  0.422  1.0
  Mg  Mg18  1  0.422  0.734  0.422  1.0
  Mg  Mg19  1  0.422  0.422  0.734  1.0
  Ir  Ir20  1  0.859  0.859  0.859  1.0
  Ir  Ir21  1  0.859  0.423  0.859  1.0
  Ir  Ir22  1  0.859  0.859  0.423  1.0
  Ir  Ir23  1  0.423  0.859  0.859  1.0
[/CIF]
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The structure described by MgLa4Ir crystallizes in the cubic F-43m space group. Mg(1) is bonded to three equivalent Mg(1), three equivalent La(1), three equivalent La(2), and three equivalent La(3) atoms to form a mixture of face and corner-sharing MgLa9Mg3 cuboctahedra. There are three inequivalent La sites. In the first La site, La(1) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Mg(1) and two equivalent Ir(1) atoms. In the second La site, La(2) is bonded in a bent 150 degrees geometry to two equivalent Mg(1) and two equivalent Ir(1) atoms. In the third La site, La(3) is bonded in a 3-coordinate geometry to three equivalent Mg(1) and three equivalent Ir(1) atoms. Ir(1) is bonded in a 6-coordinate geometry to three equivalent La(1), three equivalent La(2), and three equivalent La(3) atoms. is represented by the CIF file [CIF]
data_La4MgIr
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.193
_cell_length_b   10.193
_cell_length_c   10.193
_cell_angle_alpha   60.000
_cell_angle_beta   60.000
_cell_angle_gamma   60.000
_symmetry_Int_Tables_number   1
_cell_volume   748.871
_cell_formula_units_Z   4
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
  La  La0  1  0.440  0.060  0.440  1.0
  La  La1  1  0.812  0.812  0.188  1.0
  La  La2  1  0.060  0.440  0.060  1.0
  La  La3  1  0.188  0.812  0.188  1.0
  La  La4  1  0.812  0.188  0.188  1.0
  La  La5  1  0.060  0.060  0.440  1.0
  La  La6  1  0.655  0.655  0.655  1.0
  La  La7  1  0.655  0.034  0.655  1.0
  La  La8  1  0.188  0.812  0.812  1.0
  La  La9  1  0.034  0.655  0.655  1.0
  La  La10  1  0.060  0.440  0.440  1.0
  La  La11  1  0.188  0.188  0.812  1.0
  La  La12  1  0.655  0.655  0.034  1.0
  La  La13  1  0.440  0.060  0.060  1.0
  La  La14  1  0.812  0.188  0.812  1.0
  La  La15  1  0.440  0.440  0.060  1.0
  Mg  Mg16  1  0.734  0.422  0.422  1.0
  Mg  Mg17  1  0.422  0.422  0.422  1.0
  Mg  Mg18  1  0.422  0.734  0.422  1.0
  Mg  Mg19  1  0.422  0.422  0.734  1.0
  Ir  Ir20  1  0.859  0.859  0.859  1.0
  Ir  Ir21  1  0.859  0.423  0.859  1.0
  Ir  Ir22  1  0.859  0.859  0.423  1.0
  Ir  Ir23  1  0.423  0.859  0.859  1.0
[/CIF]
.