data_BiPt2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.55
_cell_length_b   6.55
_cell_length_c   6.55
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   BiPt2
_chemical_formula_sum   'Bi4 Pt8'
_cell_volume   281.39
_cell_formula_units_Z   4
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
  Bi  Bi0  1  0.28  0.0  0.28  1.0
  Bi  Bi1  1  0.0  0.28  0.28  1.0
  Bi  Bi2  1  0.0  0.0  0.0  1.0
  Bi  Bi3  1  0.28  0.28  0.0  1.0
  Pt  Pt4  1  0.75  0.03  0.8  1.0
  Pt  Pt5  1  0.8  0.53  0.75  1.0
  Pt  Pt6  1  0.03  0.8  0.75  1.0
  Pt  Pt7  1  0.53  0.75  0.8  1.0
  Pt  Pt8  1  0.8  0.75  0.03  1.0
  Pt  Pt9  1  0.75  0.8  0.53  1.0
  Pt  Pt10  1  0.53  0.53  0.53  1.0
  Pt  Pt11  1  0.03  0.03  0.03  1.0

data_BiPt2
_symmetry_space_group_name_H-M   R3
_cell_length_a   9.27
_cell_length_b   9.27
_cell_length_c   11.35
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   146
_chemical_formula_structural   BiPt2
_chemical_formula_sum   'Bi12 Pt24'
_cell_volume   844.18
_cell_formula_units_Z   12
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  'x+1/3, y+2/3, z+2/3'
  5  '-y+1/3, x-y+2/3, z+2/3'
  6  '-x+y+1/3, -x+2/3, z+2/3'
  7  'x+2/3, y+1/3, z+1/3'
  8  '-y+2/3, x-y+1/3, z+1/3'
  9  '-x+y+2/3, -x+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
  Bi  Bi0  9  0.09  0.18  0.18  1.0
  Bi  Bi1  3  0.0  0.0  0.0  1.0
  Pt  Pt2  9  0.06  0.17  0.69  1.0
  Pt  Pt3  9  0.17  0.11  0.86  1.0
  Pt  Pt4  3  0.0  0.0  0.03  1.0
  Pt  Pt5  3  0.0  0.0  0.53  1.0

Bi Bi Bi Bi Pt Pt Pt Pt Pt Pt Pt Pt
Bi Bi Bi Bi Pt Pt Pt Pt Pt Pt Pt Pt 0 11 o o o 0 2 o o o 0 1 o o o 0 3 o o o 1 11 o o o 1 2 o o o 1 3 o o o 2 11 o o o 2 3 o o o 2 4 - o - 2 6 o - - 2 8 - - o 3 11 o o o 4 7 o - o 4 6 + - o 4 9 o - o 4 8 o - + 4 11 + o + 5 10 o o o 5 9 o o o 5 7 o o o 5 6 + o o 5 8 o o + 6 8 - o + 6 9 - o o 6 11 o + + 7 10 o o o 7 9 o o o 7 8 o o + 8 11 + + o 9 10 o o o 
Pt2Bi crystallizes in the trigonal R3 space group. There are four inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a distorted single-bond geometry to three equivalent Pt(2) and one Bi(2) atom. There are two shorter (2.34 Å) and one longer (3.30 Å) Pt(1)-Pt(2) bond length. The Pt(1)-Bi(2) bond length is 2.09 Å. In the second Pt site, Pt(2) is bonded in a 6-coordinate geometry to one Pt(3), two equivalent Pt(2), and three equivalent Pt(1) atoms. The Pt(2)-Pt(3) bond length is 2.34 Å. Both Pt(2)-Pt(2) bond lengths are 2.36 Å. In the third Pt site, Pt(3) is bonded in a 3-coordinate geometry to three equivalent Pt(2) atoms. In the fourth Pt site, Pt(4) is bonded in a single-bond geometry to one Bi(2) and three equivalent Bi(1) atoms. The Pt(4)-Bi(2) bond length is 0.31 Å. All Pt(4)-Bi(1) bond lengths are 2.32 Å. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a distorted single-bond geometry to one Pt(4) atom. In the second Bi site, Bi(2) is bonded in a single-bond geometry to one Pt(4) and three equivalent Pt(1) atoms.