The structure described by Ba4Ca(RhO3)4 is Orthorhombic Perovskite-derived structured and crystallizes in the monoclinic Cm 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(8), two equivalent O(4), two equivalent O(5), and four equivalent O(1) atoms. In the second Ba site, Ba(2) is bonded in a 10-coordinate geometry to one O(7), one O(8), two equivalent O(3), two equivalent O(6), and four equivalent O(2) atoms. In the third Ba site, Ba(3) is bonded in a 11-coordinate geometry to one O(3), two equivalent O(1), two equivalent O(2), two equivalent O(7), and four equivalent O(5) atoms. In the fourth Ba site, Ba(4) is bonded in a 10-coordinate geometry to one O(3), one O(4), two equivalent O(2), two equivalent O(8), and four equivalent O(6) atoms. Ca(1) is bonded to one O(4), two equivalent O(1), and two equivalent O(6) atoms to form distorted CaO5 trigonal bipyramids that share corners with three equivalent Rh(4)O6 octahedra and  an edgeedge with one Rh(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 10-48°. There are four inequivalent Rh sites. In the first Rh site, Rh(1) is bonded in a 5-coordinate geometry to one O(4), two equivalent O(1), and two equivalent O(6) atoms. In the second Rh site, Rh(2) is bonded to one O(3), one O(7), two equivalent O(2), and two equivalent O(5) atoms to form a mixture of corner and face-sharing RhO6 octahedra. The corner-sharing octahedral tilt angles range from 24-30°. In the third Rh site, Rh(3) is bonded to one O(3), one O(8), two equivalent O(2), and two equivalent O(6) atoms to form RhO6 octahedra that share  an edgeedge with one Ca(1)O5 trigonal bipyramid and  a faceface with one Rh(2)O6 octahedra. In the fourth Rh site, Rh(4) is bonded to one O(4), one O(7), two equivalent O(1), and two equivalent O(5) atoms to form RhO6 octahedra that share corners with three equivalent Rh(2)O6 octahedra and corners with three equivalent Ca(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 24-30°. There are eight inequivalent O sites. In the first O site, O(1) is bonded to one Ba(3), two equivalent Ba(1), one Ca(1), one Rh(1), and one Rh(4) atom to form distorted OBa3CaRh2 octahedra that share  a cornercorner with one O(3)Ba4Rh2 octahedra, corners with four equivalent O(1)Ba3CaRh2 octahedra,  a cornercorner with one O(7)Ba3Rh2 trigonal bipyramid,  an edgeedge with one O(7)Ba3Rh2 trigonal bipyramid, and faces with two equivalent O(1)Ba3CaRh2 octahedra. The corner-sharing octahedral tilt angles range from 11-62°. In the second O site, O(2) is bonded in a 6-coordinate geometry to one Ba(3), one Ba(4), two equivalent Ba(2), one Rh(2), and one Rh(3) atom. In the third O site, O(3) is bonded to one Ba(3), one Ba(4), two equivalent Ba(2), one Rh(2), and one Rh(3) atom to form OBa4Rh2 octahedra that share corners with two equivalent O(1)Ba3CaRh2 octahedra, corners with two equivalent O(3)Ba4Rh2 octahedra,  a cornercorner with one O(7)Ba3Rh2 trigonal bipyramid, and edges with two equivalent O(7)Ba3Rh2 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 14-62°. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to one Ba(4), two equivalent Ba(1), one Ca(1), one Rh(1), and one Rh(4) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Ba(1), two equivalent Ba(3), one Rh(2), and one Rh(4) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Ba(2), two equivalent Ba(4), one Ca(1), one Rh(1), and one Rh(3) atom. In the seventh O site, O(7) is bonded to one Ba(2), two equivalent Ba(3), one Rh(2), and one Rh(4) atom to form distorted OBa3Rh2 trigonal bipyramids that share  a cornercorner with one O(3)Ba4Rh2 octahedra, corners with two equivalent O(1)Ba3CaRh2 octahedra, corners with two equivalent O(7)Ba3Rh2 trigonal bipyramids, edges with two equivalent O(1)Ba3CaRh2 octahedra, and edges with two equivalent O(3)Ba4Rh2 octahedra. The corner-sharing octahedral tilt angles range from 21-57°. In the eighth O site, O(8) is bonded in a 5-coordinate geometry to one Ba(1), one Ba(2), two equivalent Ba(4), and one Rh(3) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ba4Ca(RhO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.963
_cell_length_b   5.778
_cell_length_c   10.470
_cell_angle_alpha   90.000
_cell_angle_beta   99.823
_cell_angle_gamma   118.979
_symmetry_Int_Tables_number   1
_cell_volume   309.495
_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  0.762  0.381  0.735  1.0
  Ba  Ba1  1  0.286  0.643  0.238  1.0
  Ba  Ba2  1  0.055  0.028  0.472  1.0
  Ba  Ba3  1  0.890  0.945  0.082  1.0
  Ca  Ca4  1  0.171  0.086  0.840  1.0
  Rh  Rh5  1  0.379  0.690  0.869  1.0
  Rh  Rh6  1  0.687  0.343  0.393  1.0
  Rh  Rh7  1  0.576  0.288  0.120  1.0
  Rh  Rh8  1  0.426  0.713  0.599  1.0
  O  O9  1  0.271  0.406  0.710  1.0
  O  O10  1  0.762  0.151  0.256  1.0
  O  O11  1  0.329  0.164  0.268  1.0
  O  O12  1  0.719  0.859  0.791  1.0
  O  O13  1  0.271  0.865  0.710  1.0
  O  O14  1  0.762  0.611  0.256  1.0
  O  O15  1  0.630  0.063  0.521  1.0
  O  O16  1  0.370  0.435  0.004  1.0
  O  O17  1  0.370  0.935  0.004  1.0
  O  O18  1  0.630  0.567  0.521  1.0
  O  O19  1  0.108  0.554  0.455  1.0
  O  O20  1  0.857  0.429  0.018  1.0
[/CIF]
.
The structure described by Ba4Ca(RhO3)4 is Orthorhombic Perovskite-derived structured and crystallizes in the monoclinic Cm 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(8), two equivalent O(4), two equivalent O(5), and four equivalent O(1) atoms. In the second Ba site, Ba(2) is bonded in a 10-coordinate geometry to one O(7), one O(8), two equivalent O(3), two equivalent O(6), and four equivalent O(2) atoms. In the third Ba site, Ba(3) is bonded in a 11-coordinate geometry to one O(3), two equivalent O(1), two equivalent O(2), two equivalent O(7), and four equivalent O(5) atoms. In the fourth Ba site, Ba(4) is bonded in a 10-coordinate geometry to one O(3), one O(4), two equivalent O(2), two equivalent O(8), and four equivalent O(6) atoms. Ca(1) is bonded to one O(4), two equivalent O(1), and two equivalent O(6) atoms to form distorted CaO5 trigonal bipyramids that share corners with three equivalent Rh(4)O6 octahedra and  an edgeedge with one Rh(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 10-48°. There are four inequivalent Rh sites. In the first Rh site, Rh(1) is bonded in a 5-coordinate geometry to one O(4), two equivalent O(1), and two equivalent O(6) atoms. In the second Rh site, Rh(2) is bonded to one O(3), one O(7), two equivalent O(2), and two equivalent O(5) atoms to form a mixture of corner and face-sharing RhO6 octahedra. The corner-sharing octahedral tilt angles range from 24-30°. In the third Rh site, Rh(3) is bonded to one O(3), one O(8), two equivalent O(2), and two equivalent O(6) atoms to form RhO6 octahedra that share  an edgeedge with one Ca(1)O5 trigonal bipyramid and  a faceface with one Rh(2)O6 octahedra. In the fourth Rh site, Rh(4) is bonded to one O(4), one O(7), two equivalent O(1), and two equivalent O(5) atoms to form RhO6 octahedra that share corners with three equivalent Rh(2)O6 octahedra and corners with three equivalent Ca(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 24-30°. There are eight inequivalent O sites. In the first O site, O(1) is bonded to one Ba(3), two equivalent Ba(1), one Ca(1), one Rh(1), and one Rh(4) atom to form distorted OBa3CaRh2 octahedra that share  a cornercorner with one O(3)Ba4Rh2 octahedra, corners with four equivalent O(1)Ba3CaRh2 octahedra,  a cornercorner with one O(7)Ba3Rh2 trigonal bipyramid,  an edgeedge with one O(7)Ba3Rh2 trigonal bipyramid, and faces with two equivalent O(1)Ba3CaRh2 octahedra. The corner-sharing octahedral tilt angles range from 11-62°. In the second O site, O(2) is bonded in a 6-coordinate geometry to one Ba(3), one Ba(4), two equivalent Ba(2), one Rh(2), and one Rh(3) atom. In the third O site, O(3) is bonded to one Ba(3), one Ba(4), two equivalent Ba(2), one Rh(2), and one Rh(3) atom to form OBa4Rh2 octahedra that share corners with two equivalent O(1)Ba3CaRh2 octahedra, corners with two equivalent O(3)Ba4Rh2 octahedra,  a cornercorner with one O(7)Ba3Rh2 trigonal bipyramid, and edges with two equivalent O(7)Ba3Rh2 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 14-62°. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to one Ba(4), two equivalent Ba(1), one Ca(1), one Rh(1), and one Rh(4) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Ba(1), two equivalent Ba(3), one Rh(2), and one Rh(4) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Ba(2), two equivalent Ba(4), one Ca(1), one Rh(1), and one Rh(3) atom. In the seventh O site, O(7) is bonded to one Ba(2), two equivalent Ba(3), one Rh(2), and one Rh(4) atom to form distorted OBa3Rh2 trigonal bipyramids that share  a cornercorner with one O(3)Ba4Rh2 octahedra, corners with two equivalent O(1)Ba3CaRh2 octahedra, corners with two equivalent O(7)Ba3Rh2 trigonal bipyramids, edges with two equivalent O(1)Ba3CaRh2 octahedra, and edges with two equivalent O(3)Ba4Rh2 octahedra. The corner-sharing octahedral tilt angles range from 21-57°. In the eighth O site, O(8) is bonded in a 5-coordinate geometry to one Ba(1), one Ba(2), two equivalent Ba(4), and one Rh(3) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ba4Ca(RhO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.963
_cell_length_b   5.778
_cell_length_c   10.470
_cell_angle_alpha   90.000
_cell_angle_beta   99.823
_cell_angle_gamma   118.979
_symmetry_Int_Tables_number   1
_cell_volume   309.495
_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  0.762  0.381  0.735  1.0
  Ba  Ba1  1  0.286  0.643  0.238  1.0
  Ba  Ba2  1  0.055  0.028  0.472  1.0
  Ba  Ba3  1  0.890  0.945  0.082  1.0
  Ca  Ca4  1  0.171  0.086  0.840  1.0
  Rh  Rh5  1  0.379  0.690  0.869  1.0
  Rh  Rh6  1  0.687  0.343  0.393  1.0
  Rh  Rh7  1  0.576  0.288  0.120  1.0
  Rh  Rh8  1  0.426  0.713  0.599  1.0
  O  O9  1  0.271  0.406  0.710  1.0
  O  O10  1  0.762  0.151  0.256  1.0
  O  O11  1  0.329  0.164  0.268  1.0
  O  O12  1  0.719  0.859  0.791  1.0
  O  O13  1  0.271  0.865  0.710  1.0
  O  O14  1  0.762  0.611  0.256  1.0
  O  O15  1  0.630  0.063  0.521  1.0
  O  O16  1  0.370  0.435  0.004  1.0
  O  O17  1  0.370  0.935  0.004  1.0
  O  O18  1  0.630  0.567  0.521  1.0
  O  O19  1  0.108  0.554  0.455  1.0
  O  O20  1  0.857  0.429  0.018  1.0
[/CIF]
.