The material structure described by Ba6Ho2Rh2Al2O15 crystallizes in the orthorhombic Amm2 space group. There are four inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 9-coordinate geometry to one O(3), two equivalent O(2), two equivalent O(4), and four equivalent O(1) atoms. In the second Ba site, Ba(2) is bonded in a 8-coordinate geometry to two equivalent O(2), two equivalent O(5), and four equivalent O(1) atoms. In the third Ba site, Ba(3) is bonded in a 10-coordinate geometry to two equivalent O(1), two equivalent O(3), two equivalent O(6), and four equivalent O(4) atoms. In the fourth Ba site, Ba(4) is bonded in a 10-coordinate geometry to two equivalent O(3), four equivalent O(4), and four equivalent O(6) atoms. Ho(1) is bonded to one O(2), one O(3), two equivalent O(1), and two equivalent O(4) atoms to form HoO6 octahedra that share corners with three equivalent Rh(1)O5 square pyramids and corners with three equivalent Al(1)O4 tetrahedra. Rh(1) is bonded to one O(3), two equivalent O(4), and two equivalent O(6) atoms to form RhO5 square pyramids that share corners with three equivalent Ho(1)O6 octahedra and  an edgeedge with one Rh(1)O5 square pyramid. The corner-sharing octahedral tilt angles range from 3-5°. Al(1) is bonded to one O(2), one O(5), and two equivalent O(1) atoms to form AlO4 tetrahedra that share corners with three equivalent Ho(1)O6 octahedra and  a cornercorner with one Al(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 15-29°. There are six inequivalent O sites. In the first O site, O(5) is bonded in a bent 150 degrees geometry to two equivalent Ba(2) and two equivalent Al(1) atoms. In the second O site, O(6) is bonded to two equivalent Ba(3), two equivalent Ba(4), and two equivalent Rh(1) atoms to form distorted OBa4Rh2 octahedra that share corners with four equivalent O(6)Ba4Rh2 octahedra, corners with six equivalent O(4)Ba4HoRh octahedra, edges with four equivalent O(4)Ba4HoRh octahedra, faces with two equivalent O(4)Ba4HoRh octahedra, and faces with two equivalent O(6)Ba4Rh2 octahedra. The corner-sharing octahedral tilt angles range from 2-60°. In the third O site, O(1) is bonded in a 2-coordinate geometry to one Ba(2), one Ba(3), two equivalent Ba(1), one Ho(1), and one Al(1) atom. In the fourth O site, O(2) is bonded in a 5-coordinate geometry to one Ba(2), two equivalent Ba(1), one Ho(1), and one Al(1) atom. In the fifth O site, O(3) is bonded in a 6-coordinate geometry to one Ba(1), one Ba(4), two equivalent Ba(3), one Ho(1), and one Rh(1) atom. In the sixth O site, O(4) is bonded to one Ba(1), one Ba(4), two equivalent Ba(3), one Ho(1), and one Rh(1) atom to form distorted OBa4HoRh octahedra that share corners with three equivalent O(6)Ba4Rh2 octahedra, corners with six equivalent O(4)Ba4HoRh octahedra, edges with two equivalent O(6)Ba4Rh2 octahedra,  a faceface with one O(6)Ba4Rh2 octahedra, and faces with two equivalent O(4)Ba4HoRh octahedra. The corner-sharing octahedral tilt angles range from 3-73°. is represented by the CIF file [CIF]
data_Ba6Ho2Al2Rh2O15
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.939
_cell_length_b   5.939
_cell_length_c   14.891
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   119.803
_symmetry_Int_Tables_number   1
_cell_volume   455.806
_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
  Ba  Ba0  1  0.331  0.669  0.189  1.0
  Ba  Ba1  1  0.331  0.669  0.811  1.0
  Ba  Ba2  1  0.005  0.995  0.000  1.0
  Ba  Ba3  1  0.669  0.331  0.646  1.0
  Ba  Ba4  1  0.669  0.331  0.354  1.0
  Ba  Ba5  1  0.994  0.006  0.500  1.0
  Ho  Ho6  1  0.996  0.004  0.248  1.0
  Ho  Ho7  1  0.996  0.004  0.752  1.0
  Al  Al8  1  0.658  0.342  0.115  1.0
  Al  Al9  1  0.658  0.342  0.885  1.0
  Rh  Rh10  1  0.326  0.674  0.585  1.0
  Rh  Rh11  1  0.326  0.674  0.415  1.0
  O  O12  1  0.831  0.659  0.159  1.0
  O  O13  1  0.828  0.172  0.142  1.0
  O  O14  1  0.341  0.169  0.159  1.0
  O  O15  1  0.831  0.659  0.841  1.0
  O  O16  1  0.828  0.172  0.858  1.0
  O  O17  1  0.341  0.169  0.841  1.0
  O  O18  1  0.170  0.830  0.331  1.0
  O  O19  1  0.652  0.825  0.339  1.0
  O  O20  1  0.175  0.348  0.339  1.0
  O  O21  1  0.170  0.830  0.669  1.0
  O  O22  1  0.652  0.825  0.661  1.0
  O  O23  1  0.175  0.348  0.661  1.0
  O  O24  1  0.618  0.382  0.000  1.0
  O  O25  1  0.003  0.522  0.500  1.0
  O  O26  1  0.478  0.997  0.500  1.0
[/CIF]
.
The material structure described by Ba6Ho2Rh2Al2O15 crystallizes in the orthorhombic Amm2 space group. There are four inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 9-coordinate geometry to one O(3), two equivalent O(2), two equivalent O(4), and four equivalent O(1) atoms. In the second Ba site, Ba(2) is bonded in a 8-coordinate geometry to two equivalent O(2), two equivalent O(5), and four equivalent O(1) atoms. In the third Ba site, Ba(3) is bonded in a 10-coordinate geometry to two equivalent O(1), two equivalent O(3), two equivalent O(6), and four equivalent O(4) atoms. In the fourth Ba site, Ba(4) is bonded in a 10-coordinate geometry to two equivalent O(3), four equivalent O(4), and four equivalent O(6) atoms. Ho(1) is bonded to one O(2), one O(3), two equivalent O(1), and two equivalent O(4) atoms to form HoO6 octahedra that share corners with three equivalent Rh(1)O5 square pyramids and corners with three equivalent Al(1)O4 tetrahedra. Rh(1) is bonded to one O(3), two equivalent O(4), and two equivalent O(6) atoms to form RhO5 square pyramids that share corners with three equivalent Ho(1)O6 octahedra and  an edgeedge with one Rh(1)O5 square pyramid. The corner-sharing octahedral tilt angles range from 3-5°. Al(1) is bonded to one O(2), one O(5), and two equivalent O(1) atoms to form AlO4 tetrahedra that share corners with three equivalent Ho(1)O6 octahedra and  a cornercorner with one Al(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 15-29°. There are six inequivalent O sites. In the first O site, O(5) is bonded in a bent 150 degrees geometry to two equivalent Ba(2) and two equivalent Al(1) atoms. In the second O site, O(6) is bonded to two equivalent Ba(3), two equivalent Ba(4), and two equivalent Rh(1) atoms to form distorted OBa4Rh2 octahedra that share corners with four equivalent O(6)Ba4Rh2 octahedra, corners with six equivalent O(4)Ba4HoRh octahedra, edges with four equivalent O(4)Ba4HoRh octahedra, faces with two equivalent O(4)Ba4HoRh octahedra, and faces with two equivalent O(6)Ba4Rh2 octahedra. The corner-sharing octahedral tilt angles range from 2-60°. In the third O site, O(1) is bonded in a 2-coordinate geometry to one Ba(2), one Ba(3), two equivalent Ba(1), one Ho(1), and one Al(1) atom. In the fourth O site, O(2) is bonded in a 5-coordinate geometry to one Ba(2), two equivalent Ba(1), one Ho(1), and one Al(1) atom. In the fifth O site, O(3) is bonded in a 6-coordinate geometry to one Ba(1), one Ba(4), two equivalent Ba(3), one Ho(1), and one Rh(1) atom. In the sixth O site, O(4) is bonded to one Ba(1), one Ba(4), two equivalent Ba(3), one Ho(1), and one Rh(1) atom to form distorted OBa4HoRh octahedra that share corners with three equivalent O(6)Ba4Rh2 octahedra, corners with six equivalent O(4)Ba4HoRh octahedra, edges with two equivalent O(6)Ba4Rh2 octahedra,  a faceface with one O(6)Ba4Rh2 octahedra, and faces with two equivalent O(4)Ba4HoRh octahedra. The corner-sharing octahedral tilt angles range from 3-73°. is represented by the CIF file [CIF]
data_Ba6Ho2Al2Rh2O15
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.939
_cell_length_b   5.939
_cell_length_c   14.891
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   119.803
_symmetry_Int_Tables_number   1
_cell_volume   455.806
_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
  Ba  Ba0  1  0.331  0.669  0.189  1.0
  Ba  Ba1  1  0.331  0.669  0.811  1.0
  Ba  Ba2  1  0.005  0.995  0.000  1.0
  Ba  Ba3  1  0.669  0.331  0.646  1.0
  Ba  Ba4  1  0.669  0.331  0.354  1.0
  Ba  Ba5  1  0.994  0.006  0.500  1.0
  Ho  Ho6  1  0.996  0.004  0.248  1.0
  Ho  Ho7  1  0.996  0.004  0.752  1.0
  Al  Al8  1  0.658  0.342  0.115  1.0
  Al  Al9  1  0.658  0.342  0.885  1.0
  Rh  Rh10  1  0.326  0.674  0.585  1.0
  Rh  Rh11  1  0.326  0.674  0.415  1.0
  O  O12  1  0.831  0.659  0.159  1.0
  O  O13  1  0.828  0.172  0.142  1.0
  O  O14  1  0.341  0.169  0.159  1.0
  O  O15  1  0.831  0.659  0.841  1.0
  O  O16  1  0.828  0.172  0.858  1.0
  O  O17  1  0.341  0.169  0.841  1.0
  O  O18  1  0.170  0.830  0.331  1.0
  O  O19  1  0.652  0.825  0.339  1.0
  O  O20  1  0.175  0.348  0.339  1.0
  O  O21  1  0.170  0.830  0.669  1.0
  O  O22  1  0.652  0.825  0.661  1.0
  O  O23  1  0.175  0.348  0.661  1.0
  O  O24  1  0.618  0.382  0.000  1.0
  O  O25  1  0.003  0.522  0.500  1.0
  O  O26  1  0.478  0.997  0.500  1.0
[/CIF]
.