data_RbPt3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.48
_cell_length_b   5.48
_cell_length_c   5.48
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   RbPt3
_chemical_formula_sum   'Rb2 Pt6'
_cell_volume   164.97
_cell_formula_units_Z   2
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
  Rb  Rb6  1  0.74  0.74  0.74  1.0
  Rb  Rb7  1  0.0  0.0  0.0  1.0
  Pt  Pt0  1  0.74  0.11  0.0  1.0
  Pt  Pt1  1  0.74  0.37  0.0  1.0
  Pt  Pt2  1  0.11  0.0  0.74  1.0
  Pt  Pt3  1  0.0  0.74  0.11  1.0
  Pt  Pt4  1  0.0  0.74  0.37  1.0
  Pt  Pt5  1  0.37  0.0  0.74  1.0

data_RbPt3
_symmetry_space_group_name_H-M   R3
_cell_length_a   7.76
_cell_length_b   7.76
_cell_length_c   9.5
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   146
_chemical_formula_structural   RbPt3
_chemical_formula_sum   'Rb6 Pt18'
_cell_volume   494.91
_cell_formula_units_Z   6
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
  Rb  Rb0  3  0.0  0.0  0.0  1.0
  Rb  Rb1  3  0.0  0.0  0.74  1.0
  Pt  Pt2  9  -0.0  0.63  0.37  1.0
  Pt  Pt3  9  0.05  0.84  0.95  1.0

Rb Rb Pt Pt Pt Pt Pt Pt
RbPt3 crystallizes in the trigonal R3 space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 6-coordinate geometry to three equivalent Pt(1) and three equivalent Pt(2) atoms. All Rb(1)-Pt(1) bond lengths are 2.48 Å. All Rb(1)-Pt(2) bond lengths are 2.48 Å. In the second Rb site, Rb(2) is bonded in a trigonal non-coplanar geometry to three equivalent Pt(1) atoms. All Rb(2)-Pt(1) bond lengths are 1.54 Å. There are two inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a single-bond geometry to one Rb(1), one Rb(2), and one Pt(2) atom. The Pt(1)-Pt(2) bond length is 1.41 Å. In the second Pt site, Pt(2) is bonded in a distorted bent 150 degrees geometry to one Rb(1) and one Pt(1) atom.