data_RbCr3Pt
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.15
_cell_length_b   5.15
_cell_length_c   5.15
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   RbCr3Pt
_chemical_formula_sum   'Rb1 Cr3 Pt1'
_cell_volume   136.46
_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
  Rb  Rb3  1  0.0  0.0  0.0  1.0
  Cr  Cr0  1  0.57  0.0  0.57  1.0
  Cr  Cr1  1  0.57  0.57  0.0  1.0
  Cr  Cr2  1  0.0  0.57  0.57  1.0
  Pt  Pt4  1  0.57  0.57  0.57  1.0

data_RbCr3Pt
_symmetry_space_group_name_H-M   R3m
_cell_length_a   7.28
_cell_length_b   7.28
_cell_length_c   8.92
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   RbCr3Pt
_chemical_formula_sum   'Rb3 Cr9 Pt3'
_cell_volume   409.37
_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
  Rb  Rb0  3  0.0  0.0  0.0  1.0
  Cr  Cr1  9  0.19  0.38  0.38  1.0
  Pt  Pt2  3  0.0  0.0  0.57  1.0

Rb Cr Cr Cr Pt
RbCr3Pt crystallizes in the trigonal R3m space group. Rb(1) is bonded to twelve equivalent Cr(1) atoms to form distorted RbCr12 cuboctahedra that share corners with twelve equivalent Rb(1)Cr12 cuboctahedra, faces with six equivalent Rb(1)Cr12 cuboctahedra, and faces with eight equivalent Pt(1)Cr6 octahedra. There are a spread of Rb(1)-Cr(1) bond distances ranging from 3.10-4.18 Å. Cr(1) is bonded in a 1-coordinate geometry to four equivalent Rb(1) and two equivalent Pt(1) atoms. There is one shorter (2.19 Å) and one longer (2.96 Å) Cr(1)-Pt(1) bond length. Pt(1) is bonded to six equivalent Cr(1) atoms to form PtCr6 octahedra that share corners with six equivalent Pt(1)Cr6 octahedra and faces with eight equivalent Rb(1)Cr12 cuboctahedra. The corner-sharing octahedra are not tilted.