data_Ba4SiPt
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.81
_cell_length_b   6.81
_cell_length_c   6.81
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ba4SiPt
_chemical_formula_sum   'Ba4 Si1 Pt1'
_cell_volume   223.46
_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
  Ba  Ba0  1  0.02  0.02  0.61  1.0
  Ba  Ba1  1  0.02  0.61  0.02  1.0
  Ba  Ba2  1  0.61  0.02  0.02  1.0
  Ba  Ba3  1  0.61  0.61  0.61  1.0
  Si  Si5  1  0.0  0.0  0.0  1.0
  Pt  Pt4  1  0.22  0.22  0.22  1.0

data_Ba4SiPt
_symmetry_space_group_name_H-M   R3m
_cell_length_a   6.81
_cell_length_b   6.81
_cell_length_c   16.68
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   Ba4SiPt
_chemical_formula_sum   'Ba12 Si3 Pt3'
_cell_volume   670.39
_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
  Ba  Ba0  9  0.2  0.4  0.78  1.0
  Ba  Ba1  3  0.0  0.0  0.39  1.0
  Si  Si2  3  0.0  0.0  0.0  1.0
  Pt  Pt3  3  0.0  0.0  0.78  1.0

Ba Ba Ba Ba Si Pt
Ba4PtSi crystallizes in the trigonal R3m space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a distorted bent 120 degrees geometry to three equivalent Ba(2), one Pt(1), and one Si(1) atom. There are two shorter (3.58 Å) and one longer (4.78 Å) Ba(1)-Ba(2) bond length. The Ba(1)-Pt(1) bond length is 2.34 Å. The Ba(1)-Si(1) bond length is 2.51 Å. In the second Ba site, Ba(2) is bonded in a 15-coordinate geometry to nine equivalent Ba(1), three equivalent Pt(1), and three equivalent Si(1) atoms. All Ba(2)-Pt(1) bond lengths are 4.04 Å. All Ba(2)-Si(1) bond lengths are 4.03 Å. Pt(1) is bonded in a trigonal planar geometry to three equivalent Ba(1) and three equivalent Ba(2) atoms. Si(1) is bonded in a 3-coordinate geometry to three equivalent Ba(1) and three equivalent Ba(2) atoms.