data_SrPt8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.46
_cell_length_b   6.46
_cell_length_c   6.46
_cell_angle_alpha   95.65
_cell_angle_beta   95.65
_cell_angle_gamma   143.42
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SrPt8
_chemical_formula_sum   'Sr1 Pt8'
_cell_volume   152.48
_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  Sr8  1  0.0  0.0  0.0  1.0
  Pt  Pt0  1  0.93  0.0  0.0  1.0
  Pt  Pt1  1  0.75  0.0  0.0  1.0
  Pt  Pt2  1  0.0  0.93  0.0  1.0
  Pt  Pt3  1  0.83  0.83  0.0  1.0
  Pt  Pt4  1  0.51  0.49  0.03  1.0
  Pt  Pt5  1  0.0  0.75  0.0  1.0
  Pt  Pt6  1  0.49  0.51  0.03  1.0
  Pt  Pt7  1  0.51  0.51  0.03  1.0

data_SrPt8
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.05
_cell_length_b   12.27
_cell_length_c   6.46
_cell_angle_alpha   90.0
_cell_angle_beta   108.29
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   SrPt8
_chemical_formula_sum   'Sr2 Pt16'
_cell_volume   304.97
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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  Sr0  2  0.0  0.0  0.0  1.0
  Pt  Pt1  4  0.0  0.49  0.97  1.0
  Pt  Pt2  4  0.04  0.04  0.0  1.0
  Pt  Pt3  4  0.13  0.13  0.0  1.0
  Pt  Pt4  2  0.17  0.0  -0.0  1.0
  Pt  Pt5  2  0.49  0.0  0.97  1.0

Sr Pt Pt Pt Pt Pt Pt Pt Pt
SrPt5(Pt)3 crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two platinum molecules and two SrPt5 clusters. In each SrPt5 cluster, Sr(1) is bonded in a 3-coordinate geometry to one Pt(3) and two equivalent Pt(1) atoms. The Sr(1)-Pt(3) bond length is 0.70 Å. Both Sr(1)-Pt(1) bond lengths are 0.46 Å. There are three inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a single-bond geometry to one Sr(1) and one Pt(2) atom. The Pt(1)-Pt(2) bond length is 1.18 Å. In the second Pt site, Pt(2) is bonded in a single-bond geometry to one Pt(1) atom. In the third Pt site, Pt(3) is bonded in a distorted single-bond geometry to one Sr(1) atom.