data_SrSi4Pt
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.34
_cell_length_b   5.34
_cell_length_c   5.34
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SrSi4Pt
_chemical_formula_sum   'Sr1 Si4 Pt1'
_cell_volume   107.55
_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
  Sr  Sr5  1  0.0  0.0  0.0  1.0
  Si  Si1  1  0.85  0.85  0.7  1.0
  Si  Si2  1  0.85  0.7  0.85  1.0
  Si  Si3  1  0.7  0.85  0.85  1.0
  Si  Si4  1  0.7  0.7  0.7  1.0
  Pt  Pt0  1  0.89  0.89  0.89  1.0

data_SrSi4Pt
_symmetry_space_group_name_H-M   R3m
_cell_length_a   5.34
_cell_length_b   5.34
_cell_length_c   13.08
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   SrSi4Pt
_chemical_formula_sum   'Sr3 Si12 Pt3'
_cell_volume   322.66
_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
  Sr  Sr0  3  0.0  0.0  0.0  1.0
  Si  Si1  9  0.1  0.05  0.2  1.0
  Si  Si2  3  0.0  0.0  0.3  1.0
  Pt  Pt3  3  0.0  0.0  0.11  1.0

Sr Si Si Si Si Pt
Sr Si Si Si Si Pt 0 5 - - - 1 2 o o o 1 3 o o o 1 4 o o o 1 5 o o o 2 3 o o o 2 4 o o o 2 5 o o o 3 4 o o o 3 5 o o o 
SrPtSi4 crystallizes in the trigonal R3m space group. Sr(1) is bonded in a single-bond geometry to one Pt(1), three equivalent Si(1), and three equivalent Si(2) atoms. The Sr(1)-Pt(1) bond length is 1.47 Å. All Sr(1)-Si(1) bond lengths are 3.15 Å. All Sr(1)-Si(2) bond lengths are 3.12 Å. Pt(1) is bonded in a distorted single-bond geometry to one Sr(1) and three equivalent Si(1) atoms. All Pt(1)-Si(1) bond lengths are 1.24 Å. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a distorted pentagonal planar geometry to one Sr(1), one Pt(1), one Si(2), and two equivalent Si(1) atoms. The Si(1)-Si(2) bond length is 1.35 Å. Both Si(1)-Si(1) bond lengths are 0.78 Å. In the second Si site, Si(2) is bonded in a 6-coordinate geometry to three equivalent Sr(1) and three equivalent Si(1) atoms.