data_HoMgPt2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.7
_cell_length_b   4.7
_cell_length_c   4.7
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   HoMgPt2
_chemical_formula_sum   'Ho1 Mg1 Pt2'
_cell_volume   73.41
_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
  Ho  Ho0  1  0.32  0.32  0.32  1.0
  Mg  Mg1  1  0.0  0.0  0.0  1.0
  Pt  Pt2  1  0.66  0.66  0.66  1.0
  Pt  Pt3  1  0.99  0.99  0.99  1.0

data_HoMgPt2
_symmetry_space_group_name_H-M   R3m
_cell_length_a   4.7
_cell_length_b   4.7
_cell_length_c   11.51
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   HoMgPt2
_chemical_formula_sum   'Ho3 Mg3 Pt6'
_cell_volume   220.24
_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
  Ho  Ho0  3  0.0  0.0  0.68  1.0
  Mg  Mg1  3  0.0  0.0  0.0  1.0
  Pt  Pt2  3  0.0  0.0  0.01  1.0
  Pt  Pt3  3  0.0  0.0  0.34  1.0

Ho Mg Pt Pt
MgHoPt2 crystallizes in the trigonal R3m space group. Mg(1) is bonded in a single-bond geometry to four equivalent Ho(1) and one Pt(2) atom. There are three shorter (2.72 Å) and one longer (3.72 Å) Mg(1)-Ho(1) bond length. The Mg(1)-Pt(2) bond length is 0.17 Å. Ho(1) is bonded in a 11-coordinate geometry to four equivalent Mg(1), three equivalent Pt(2), and four equivalent Pt(1) atoms. All Ho(1)-Pt(2) bond lengths are 2.71 Å. There are three shorter (2.71 Å) and one longer (3.89 Å) Ho(1)-Pt(1) bond length. There are two inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a 3-coordinate geometry to four equivalent Ho(1) atoms. In the second Pt site, Pt(2) is bonded in a single-bond geometry to one Mg(1) and three equivalent Ho(1) atoms.