data_Si4SnRh
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.2
_cell_length_b   5.2
_cell_length_c   5.2
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Si4SnRh
_chemical_formula_sum   'Si4 Sn1 Rh1'
_cell_volume   99.29
_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
  Si  Si1  1  0.59  0.59  0.76  1.0
  Si  Si2  1  0.59  0.76  0.59  1.0
  Si  Si3  1  0.76  0.59  0.59  1.0
  Si  Si4  1  0.76  0.76  0.76  1.0
  Sn  Sn5  1  0.51  0.51  0.51  1.0
  Rh  Rh0  1  0.0  0.0  0.0  1.0

data_Si4SnRh
_symmetry_space_group_name_H-M   R3m
_cell_length_a   5.2
_cell_length_b   5.2
_cell_length_c   12.73
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   Si4SnRh
_chemical_formula_sum   'Si12 Sn3 Rh3'
_cell_volume   297.86
_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
  Si  Si0  9  0.05  0.11  0.35  1.0
  Si  Si1  3  0.0  0.0  0.24  1.0
  Sn  Sn2  3  0.0  0.0  0.49  1.0
  Rh  Rh3  3  0.0  0.0  0.0  1.0

Si Si Si Si Sn Rh
RhSnSi4 crystallizes in the trigonal R3m space group. Rh(1) is bonded in a 7-coordinate geometry to one Si(2) and six equivalent Si(1) atoms. The Rh(1)-Si(2) bond length is 3.10 Å. All Rh(1)-Si(1) bond lengths are 2.80 Å. Sn(1) is bonded in a 3-coordinate geometry to three equivalent Si(1) atoms. All Sn(1)-Si(1) bond lengths are 1.79 Å. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 2-coordinate geometry to two equivalent Rh(1), one Sn(1), one Si(2), and two equivalent Si(1) atoms. The Si(1)-Si(2) bond length is 1.46 Å. Both Si(1)-Si(1) bond lengths are 0.84 Å. In the second Si site, Si(2) is bonded in a 4-coordinate geometry to one Rh(1) and three equivalent Si(1) atoms.