data_MgIr2Pt
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.1
_cell_length_b   9.1
_cell_length_c   9.1
_cell_angle_alpha   17.72
_cell_angle_beta   17.72
_cell_angle_gamma   17.72
_symmetry_Int_Tables_number   1
_chemical_formula_structural   MgIr2Pt
_chemical_formula_sum   'Mg1 Ir2 Pt1'
_cell_volume   60.99
_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
  Mg  Mg2  1  0.0  0.0  0.0  1.0
  Ir  Ir0  1  0.0  0.0  0.72  1.0
  Ir  Ir1  1  0.0  0.0  0.14  1.0
  Pt  Pt3  1  0.0  0.0  0.43  1.0

data_MgIr2Pt
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.86
_cell_length_b   2.8
_cell_length_c   9.1
_cell_angle_alpha   90.0
_cell_angle_beta   100.25
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   MgIr2Pt
_chemical_formula_sum   'Mg2 Ir4 Pt2'
_cell_volume   121.99
_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
  Mg  Mg0  2  0.0  0.0  0.0  1.0
  Ir  Ir1  2  0.0  0.0  0.28  1.0
  Ir  Ir2  2  0.0  0.0  0.86  1.0
  Pt  Pt3  2  0.0  0.0  0.57  1.0

Mg Ir Ir Pt
MgIr2Pt crystallizes in the monoclinic Cm space group. Mg(1) is bonded in a distorted single-bond geometry to one Ir(1) and one Ir(2) atom. The Mg(1)-Ir(1) bond length is 2.50 Å. The Mg(1)-Ir(2) bond length is 1.31 Å. There are two inequivalent Ir sites. In the first Ir site, Ir(1) is bonded in a 1-coordinate geometry to one Mg(1) and one Pt(1) atom. The Ir(1)-Pt(1) bond length is 2.64 Å. In the second Ir site, Ir(2) is bonded in a single-bond geometry to one Mg(1) and one Pt(1) atom. The Ir(2)-Pt(1) bond length is 2.64 Å. Pt(1) is bonded to one Ir(1), one Ir(2), and six equivalent Pt(1) atoms to form a mixture of distorted corner and edge-sharing PtIr2Pt6 hexagonal bipyramids. All Pt(1)-Pt(1) bond lengths are 2.80 Å.