data_Nb4HgPt
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.38
_cell_length_b   5.38
_cell_length_c   5.38
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Nb4HgPt
_chemical_formula_sum   'Nb4 Hg1 Pt1'
_cell_volume   110.16
_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
  Nb  Nb1  1  0.75  0.86  0.86  1.0
  Nb  Nb2  1  0.86  0.86  0.75  1.0
  Nb  Nb3  1  0.86  0.75  0.86  1.0
  Nb  Nb4  1  0.75  0.75  0.75  1.0
  Hg  Hg0  1  0.9  0.9  0.9  1.0
  Pt  Pt5  1  0.0  0.0  0.0  1.0

data_Nb4HgPt
_symmetry_space_group_name_H-M   R3m
_cell_length_a   5.38
_cell_length_b   5.38
_cell_length_c   13.18
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   Nb4HgPt
_chemical_formula_sum   'Nb12 Hg3 Pt3'
_cell_volume   330.47
_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
  Nb  Nb0  9  0.07  0.04  0.18  1.0
  Nb  Nb1  3  0.0  0.0  0.25  1.0
  Hg  Hg2  3  0.0  0.0  0.1  1.0
  Pt  Pt3  3  0.0  0.0  0.0  1.0

Nb Nb Nb Nb Hg Pt
Nb4PtHg crystallizes in the trigonal R3m space group. There are two inequivalent Nb sites. In the first Nb site, Nb(1) is bonded in a 2-coordinate geometry to one Nb(2), two equivalent Nb(1), and one Hg(1) atom. The Nb(1)-Nb(2) bond length is 1.03 Å. Both Nb(1)-Nb(1) bond lengths are 0.60 Å. The Nb(1)-Hg(1) bond length is 1.10 Å. In the second Nb site, Nb(2) is bonded in a 6-coordinate geometry to three equivalent Nb(1) and three equivalent Pt(1) atoms. All Nb(2)-Pt(1) bond lengths are 3.29 Å. Pt(1) is bonded in a single-bond geometry to three equivalent Nb(2) and one Hg(1) atom. The Pt(1)-Hg(1) bond length is 1.29 Å. Hg(1) is bonded in a 4-coordinate geometry to three equivalent Nb(1) and one Pt(1) atom.