data_NaCr4Rh
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.84
_cell_length_b   4.84
_cell_length_c   4.84
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NaCr4Rh
_chemical_formula_sum   'Na1 Cr4 Rh1'
_cell_volume   80.27
_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
  Na  Na4  1  0.0  0.0  0.0  1.0
  Cr  Cr0  1  0.56  0.56  0.29  1.0
  Cr  Cr1  1  0.56  0.29  0.56  1.0
  Cr  Cr2  1  0.29  0.56  0.56  1.0
  Cr  Cr3  1  0.29  0.29  0.29  1.0
  Rh  Rh5  1  0.71  0.71  0.71  1.0

data_NaCr4Rh
_symmetry_space_group_name_H-M   R3m
_cell_length_a   4.84
_cell_length_b   4.84
_cell_length_c   11.86
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   NaCr4Rh
_chemical_formula_sum   'Na3 Cr12 Rh3'
_cell_volume   240.81
_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
  Na  Na0  3  0.0  0.0  0.0  1.0
  Cr  Cr1  9  0.18  0.09  0.53  1.0
  Cr  Cr2  3  0.0  0.0  0.71  1.0
  Rh  Rh3  3  0.0  0.0  0.29  1.0

Na Cr Cr Cr Cr Rh
NaCr4Rh crystallizes in the trigonal R3m space group. Na(1) is bonded in a 17-coordinate geometry to four equivalent Cr(2), nine equivalent Cr(1), and four equivalent Rh(1) atoms. There are three shorter (2.84 Å) and one longer (3.46 Å) Na(1)-Cr(2) bond length. There are six shorter (2.97 Å) and three longer (3.13 Å) Na(1)-Cr(1) bond lengths. There are three shorter (2.85 Å) and one longer (3.42 Å) Na(1)-Rh(1) bond length. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded in a 3-coordinate geometry to three equivalent Na(1), two equivalent Cr(1), three equivalent Cr(2), and one Rh(1) atom. Both Cr(1)-Cr(1) bond lengths are 1.28 Å. There is one shorter (2.22 Å) and two longer (3.13 Å) Cr(1)-Cr(2) bond lengths. The Cr(1)-Rh(1) bond length is 2.31 Å. In the second Cr site, Cr(2) is bonded in a 16-coordinate geometry to four equivalent Na(1), nine equivalent Cr(1), and three equivalent Rh(1) atoms. All Cr(2)-Rh(1) bond lengths are 2.98 Å. Rh(1) is bonded in a 6-coordinate geometry to four equivalent Na(1), three equivalent Cr(1), and three equivalent Cr(2) atoms.