data_Sr3HRh
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.08
_cell_length_b   5.08
_cell_length_c   5.08
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Sr3HRh
_chemical_formula_sum   'Sr3 H1 Rh1'
_cell_volume   131.23
_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  Sr0  1  0.0  0.54  0.0  1.0
  Sr  Sr1  1  0.0  0.0  0.54  1.0
  Sr  Sr2  1  0.54  0.0  0.0  1.0
  H  H4  1  0.0  0.0  0.0  1.0
  Rh  Rh3  1  0.54  0.54  0.54  1.0

data_Sr3HRh
_symmetry_space_group_name_H-M   R3m
_cell_length_a   7.19
_cell_length_b   7.19
_cell_length_c   8.8
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   Sr3HRh
_chemical_formula_sum   'Sr9 H3 Rh3'
_cell_volume   393.68
_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
  Sr  Sr0  9  0.03  0.51  0.51  1.0
  H  H1  3  0.0  0.0  0.0  1.0
  Rh  Rh2  3  0.0  0.0  0.54  1.0

Sr Sr Sr H Rh
Sr Sr Sr H Rh 0 3 o o o 0 3 o + o 0 4 o o o 0 4 o o - 0 4 - o o 0 4 - o - 1 3 o o o 1 3 o o + 1 4 o o o 1 4 o - o 1 4 - o o 1 4 - - o 2 3 o o o 2 3 + o o 2 4 o o o 2 4 o o - 2 4 o - o 2 4 o - - 3 4 - - - 
Sr3RhH is (Cubic) Perovskite structured and crystallizes in the trigonal R3m space group. Sr(1) is bonded in a 2-coordinate geometry to four equivalent Rh(1) and two equivalent H(1) atoms. There are a spread of Sr(1)-Rh(1) bond distances ranging from 3.30-3.89 Å. There is one shorter (2.33 Å) and one longer (2.75 Å) Sr(1)-H(1) bond length. Rh(1) is bonded to twelve equivalent Sr(1) atoms to form RhSr12 cuboctahedra that share corners with twelve equivalent Rh(1)Sr12 cuboctahedra, faces with six equivalent Rh(1)Sr12 cuboctahedra, and faces with eight equivalent H(1)Sr6 octahedra. H(1) is bonded to six equivalent Sr(1) atoms to form HSr6 octahedra that share corners with six equivalent H(1)Sr6 octahedra and faces with eight equivalent Rh(1)Sr12 cuboctahedra. The corner-sharing octahedra are not tilted.