data_MgPt2Au
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.95
_cell_length_b   4.95
_cell_length_c   4.95
_cell_angle_alpha   131.85
_cell_angle_beta   131.85
_cell_angle_gamma   70.47
_symmetry_Int_Tables_number   1
_chemical_formula_structural   MgPt2Au
_chemical_formula_sum   'Mg1 Pt2 Au1'
_cell_volume   66.03
_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  Mg1  1  0.0  0.0  0.0  1.0
  Pt  Pt2  1  0.02  0.0  0.02  1.0
  Pt  Pt3  1  0.0  0.02  0.02  1.0
  Au  Au0  1  0.0  0.0  0.04  1.0

data_MgPt2Au
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.71
_cell_length_b   5.71
_cell_length_c   4.95
_cell_angle_alpha   90.0
_cell_angle_beta   125.24
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   MgPt2Au
_chemical_formula_sum   'Mg2 Pt4 Au2'
_cell_volume   132.06
_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
  Pt  Pt1  4  0.49  0.49  0.0  1.0
  Au  Au2  2  0.0  0.0  0.04  1.0

Mg Pt Pt Au
MgPt2Au is Indium-like structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two MgPt2Au clusters. Mg(1) is bonded in an L-shaped geometry to two equivalent Pt(1) atoms. Both Mg(1)-Pt(1) bond lengths are 0.09 Å. Pt(1) is bonded in a distorted single-bond geometry to one Mg(1) and one Au(1) atom. The Pt(1)-Au(1) bond length is 0.19 Å. Au(1) is bonded in a 2-coordinate geometry to two equivalent Pt(1) atoms.