data_MgCu4Pt
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.86
_cell_length_b   4.86
_cell_length_c   4.86
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   MgCu4Pt
_chemical_formula_sum   'Mg1 Cu4 Pt1'
_cell_volume   81.13
_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  Mg4  1  0.0  0.0  0.0  1.0
  Cu  Cu0  1  0.58  0.58  0.29  1.0
  Cu  Cu1  1  0.58  0.29  0.58  1.0
  Cu  Cu2  1  0.29  0.58  0.58  1.0
  Cu  Cu3  1  0.29  0.29  0.29  1.0
  Pt  Pt5  1  0.72  0.72  0.72  1.0

data_MgCu4Pt
_symmetry_space_group_name_H-M   R3m
_cell_length_a   4.86
_cell_length_b   4.86
_cell_length_c   11.9
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   MgCu4Pt
_chemical_formula_sum   'Mg3 Cu12 Pt3'
_cell_volume   243.38
_cell_formula_units_Z   3
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-y, x-y, z'
  3  '-x+y, -x, z'
  4  '-y, -x, z'
  5  '-x+y, y, z'
  6  'x, x-y, z'
  7  'x+1/3, y+2/3, z+2/3'
  8  '-y+1/3, x-y+2/3, z+2/3'
  9  '-x+y+1/3, -x+2/3, z+2/3'
  10  '-y+1/3, -x+2/3, z+2/3'
  11  '-x+y+1/3, y+2/3, z+2/3'
  12  'x+1/3, x-y+2/3, z+2/3'
  13  'x+2/3, y+1/3, z+1/3'
  14  '-y+2/3, x-y+1/3, z+1/3'
  15  '-x+y+2/3, -x+1/3, z+1/3'
  16  '-y+2/3, -x+1/3, z+1/3'
  17  '-x+y+2/3, y+1/3, z+1/3'
  18  'x+2/3, x-y+1/3, z+1/3'
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  3  0.0  0.0  0.0  1.0
  Cu  Cu1  9  0.19  0.09  0.52  1.0
  Cu  Cu2  3  0.0  0.0  0.71  1.0
  Pt  Pt3  3  0.0  0.0  0.28  1.0

Mg Cu Cu Cu Cu Pt
Mg Cu Cu Cu Cu Pt 0 1 - - o 0 1 - o o 0 1 o - o 0 5 - - - 0 5 - - o 0 5 - o - 0 5 o - - 0 2 - o - 0 2 - o o 0 2 o o - 0 4 - o o 0 4 o - o 0 4 o o - 0 3 o - - 0 3 o - o 0 3 o o - 1 2 o o o 1 3 o o o 1 4 + o o 1 4 o + o 1 4 o o o 1 5 o o o 1 5 o o - 2 3 o o o 2 4 + o o 2 4 o o + 2 4 o o o 2 5 o o o 2 5 o - o 3 4 o + o 3 4 o o + 3 4 o o o 3 5 o o o 3 5 - o o 4 5 - o o 4 5 o - o 4 5 o o - 
MgPtCu4 crystallizes in the trigonal R3m space group. Mg(1) is bonded in a 9-coordinate geometry to three equivalent Pt(1), three equivalent Cu(1), and three equivalent Cu(2) atoms. All Mg(1)-Pt(1) bond lengths are 2.87 Å. All Mg(1)-Cu(1) bond lengths are 2.97 Å. All Mg(1)-Cu(2) bond lengths are 2.84 Å. Pt(1) is bonded in a 6-coordinate geometry to three equivalent Mg(1) and three equivalent Cu(1) atoms. All Pt(1)-Cu(1) bond lengths are 2.33 Å. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 3-coordinate geometry to one Mg(1), one Pt(1), and two equivalent Cu(1) atoms. Both Cu(1)-Cu(1) bond lengths are 1.38 Å. In the second Cu site, Cu(2) is bonded in a 3-coordinate geometry to three equivalent Mg(1) atoms.