The compound described by CaNd4(RhO3)4 crystallizes in the monoclinic Pm space group. Ca(1) is bonded in a 6-coordinate geometry to one O(6), one O(8), two equivalent O(1), and two equivalent O(4) atoms. There are four inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a 8-coordinate geometry to one O(6), one O(8), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. In the second Nd site, Nd(2) is bonded in a 6-coordinate geometry to one O(5), one O(7), two equivalent O(1), and two equivalent O(4) atoms. In the third Nd site, Nd(3) is bonded in a 6-coordinate geometry to one O(6), one O(8), two equivalent O(2), and two equivalent O(4) atoms. In the fourth Nd site, Nd(4) is bonded in a 8-coordinate geometry to one O(5), one O(7), two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. There are two inequivalent Rh sites. In the first Rh site, Rh(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(8) atom to form distorted corner-sharing RhO6 octahedra. The corner-sharing octahedral tilt angles range from 27-47°. In the second Rh site, Rh(2) is bonded in a distorted rectangular see-saw-like geometry to one O(2), one O(3), one O(6), and one O(7) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted see-saw-like geometry to one Ca(1), one Nd(2), one Nd(4), and one Rh(1) atom. In the second O site, O(2) is bonded to one Nd(1), one Nd(3), one Nd(4), one Rh(1), and one Rh(2) atom to form distorted ONd3Rh2 trigonal bipyramids that share  a cornercorner with one O(8)CaNd2Rh2 square pyramid, corners with three equivalent O(4)CaNd3Rh square pyramids,  a cornercorner with one O(6)CaNd2Rh2 trigonal bipyramid,  a cornercorner with one O(2)Nd3Rh2 trigonal bipyramid, corners with four equivalent O(3)Nd2Rh2 trigonal pyramids,  an edgeedge with one O(8)CaNd2Rh2 square pyramid,  an edgeedge with one O(4)CaNd3Rh square pyramid,  an edgeedge with one O(7)Nd2Rh2 tetrahedra,  an edgeedge with one O(6)CaNd2Rh2 trigonal bipyramid,  an edgeedge with one O(2)Nd3Rh2 trigonal bipyramid,  an edgeedge with one O(3)Nd2Rh2 trigonal pyramid, and  an edgeedge with one O(5)Nd2Rh2 trigonal pyramid. In the third O site, O(3) is bonded to one Nd(1), one Nd(4), one Rh(1), and one Rh(2) atom to form distorted ONd2Rh2 trigonal pyramids that share  a cornercorner with one O(4)CaNd3Rh square pyramid, corners with two equivalent O(7)Nd2Rh2 tetrahedra, corners with four equivalent O(2)Nd3Rh2 trigonal bipyramids, corners with two equivalent O(3)Nd2Rh2 trigonal pyramids, corners with two equivalent O(5)Nd2Rh2 trigonal pyramids,  an edgeedge with one O(8)CaNd2Rh2 square pyramid,  an edgeedge with one O(4)CaNd3Rh square pyramid,  an edgeedge with one O(6)CaNd2Rh2 trigonal bipyramid, and  an edgeedge with one O(2)Nd3Rh2 trigonal bipyramid. In the fourth O site, O(4) is bonded to one Ca(1), one Nd(1), one Nd(2), one Nd(3), and one Rh(1) atom to form distorted OCaNd3Rh square pyramids that share  a cornercorner with one O(8)CaNd2Rh2 square pyramid,  a cornercorner with one O(4)CaNd3Rh square pyramid,  a cornercorner with one O(7)Nd2Rh2 tetrahedra, corners with three equivalent O(6)CaNd2Rh2 trigonal bipyramids, corners with three equivalent O(2)Nd3Rh2 trigonal bipyramids,  a cornercorner with one O(3)Nd2Rh2 trigonal pyramid,  an edgeedge with one O(2)Nd3Rh2 trigonal bipyramid,  an edgeedge with one O(3)Nd2Rh2 trigonal pyramid,  an edgeedge with one O(5)Nd2Rh2 trigonal pyramid,  a faceface with one O(8)CaNd2Rh2 square pyramid, and  a faceface with one O(4)CaNd3Rh square pyramid. In the fifth O site, O(5) is bonded to one Nd(2), one Nd(4), and two equivalent Rh(1) atoms to form distorted ONd2Rh2 trigonal pyramids that share corners with two equivalent O(8)CaNd2Rh2 square pyramids, corners with two equivalent O(7)Nd2Rh2 tetrahedra, corners with four equivalent O(3)Nd2Rh2 trigonal pyramids, edges with two equivalent O(4)CaNd3Rh square pyramids, and edges with two equivalent O(2)Nd3Rh2 trigonal bipyramids. In the sixth O site, O(6) is bonded to one Ca(1), one Nd(1), one Nd(3), and two equivalent Rh(2) atoms to form distorted OCaNd2Rh2 trigonal bipyramids that share  a cornercorner with one O(8)CaNd2Rh2 square pyramid, corners with six equivalent O(4)CaNd3Rh square pyramids, corners with two equivalent O(7)Nd2Rh2 tetrahedra, corners with two equivalent O(2)Nd3Rh2 trigonal bipyramids,  an edgeedge with one O(8)CaNd2Rh2 square pyramid, edges with two equivalent O(2)Nd3Rh2 trigonal bipyramids, and edges with two equivalent O(3)Nd2Rh2 trigonal pyramids. In the seventh O site, O(7) is bonded to one Nd(2), one Nd(4), and two equivalent Rh(2) atoms to form ONd2Rh2 tetrahedra that share corners with two equivalent O(4)CaNd3Rh square pyramids, corners with two equivalent O(6)CaNd2Rh2 trigonal bipyramids, corners with two equivalent O(5)Nd2Rh2 trigonal pyramids, corners with four equivalent O(3)Nd2Rh2 trigonal pyramids, and edges with two equivalent O(2)Nd3Rh2 trigonal bipyramids. In the eighth O site, O(8) is bonded to one Ca(1), one Nd(1), one Nd(3), and two equivalent Rh(1) atoms to form distorted OCaNd2Rh2 square pyramids that share corners with two equivalent O(4)CaNd3Rh square pyramids,  a cornercorner with one O(6)CaNd2Rh2 trigonal bipyramid, corners with two equivalent O(2)Nd3Rh2 trigonal bipyramids, corners with two equivalent O(5)Nd2Rh2 trigonal pyramids,  an edgeedge with one O(6)CaNd2Rh2 trigonal bipyramid, edges with two equivalent O(2)Nd3Rh2 trigonal bipyramids, edges with two equivalent O(3)Nd2Rh2 trigonal pyramids, and faces with two equivalent O(4)CaNd3Rh square pyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_CaNd4(RhO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.318
_cell_length_b   6.308
_cell_length_c   7.454
_cell_angle_alpha   89.999
_cell_angle_beta   89.998
_cell_angle_gamma   72.114
_symmetry_Int_Tables_number   1
_cell_volume   282.724
_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
  Ca  Ca0  1  0.916  0.842  0.750  1.0
  Nd  Nd1  1  0.489  0.568  0.750  1.0
  Nd  Nd2  1  0.045  0.947  0.250  1.0
  Nd  Nd3  1  0.167  0.161  0.750  1.0
  Nd  Nd4  1  0.522  0.388  0.250  1.0
  Rh  Rh5  1  0.495  0.978  0.487  1.0
  Rh  Rh6  1  0.977  0.503  0.475  1.0
  Rh  Rh7  1  0.977  0.503  0.025  1.0
  Rh  Rh8  1  0.495  0.978  0.013  1.0
  O  O9  1  0.754  0.101  0.452  1.0
  O  O10  1  0.326  0.337  0.539  1.0
  O  O11  1  0.651  0.646  0.054  1.0
  O  O12  1  0.226  0.853  0.948  1.0
  O  O13  1  0.226  0.853  0.552  1.0
  O  O14  1  0.651  0.646  0.446  1.0
  O  O15  1  0.326  0.337  0.961  1.0
  O  O16  1  0.754  0.101  0.048  1.0
  O  O17  1  0.375  0.059  0.250  1.0
  O  O18  1  0.880  0.488  0.750  1.0
  O  O19  1  0.108  0.562  0.250  1.0
  O  O20  1  0.564  0.919  0.750  1.0
[/CIF]
.
The compound described by CaNd4(RhO3)4 crystallizes in the monoclinic Pm space group. Ca(1) is bonded in a 6-coordinate geometry to one O(6), one O(8), two equivalent O(1), and two equivalent O(4) atoms. There are four inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a 8-coordinate geometry to one O(6), one O(8), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. In the second Nd site, Nd(2) is bonded in a 6-coordinate geometry to one O(5), one O(7), two equivalent O(1), and two equivalent O(4) atoms. In the third Nd site, Nd(3) is bonded in a 6-coordinate geometry to one O(6), one O(8), two equivalent O(2), and two equivalent O(4) atoms. In the fourth Nd site, Nd(4) is bonded in a 8-coordinate geometry to one O(5), one O(7), two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. There are two inequivalent Rh sites. In the first Rh site, Rh(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(8) atom to form distorted corner-sharing RhO6 octahedra. The corner-sharing octahedral tilt angles range from 27-47°. In the second Rh site, Rh(2) is bonded in a distorted rectangular see-saw-like geometry to one O(2), one O(3), one O(6), and one O(7) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted see-saw-like geometry to one Ca(1), one Nd(2), one Nd(4), and one Rh(1) atom. In the second O site, O(2) is bonded to one Nd(1), one Nd(3), one Nd(4), one Rh(1), and one Rh(2) atom to form distorted ONd3Rh2 trigonal bipyramids that share  a cornercorner with one O(8)CaNd2Rh2 square pyramid, corners with three equivalent O(4)CaNd3Rh square pyramids,  a cornercorner with one O(6)CaNd2Rh2 trigonal bipyramid,  a cornercorner with one O(2)Nd3Rh2 trigonal bipyramid, corners with four equivalent O(3)Nd2Rh2 trigonal pyramids,  an edgeedge with one O(8)CaNd2Rh2 square pyramid,  an edgeedge with one O(4)CaNd3Rh square pyramid,  an edgeedge with one O(7)Nd2Rh2 tetrahedra,  an edgeedge with one O(6)CaNd2Rh2 trigonal bipyramid,  an edgeedge with one O(2)Nd3Rh2 trigonal bipyramid,  an edgeedge with one O(3)Nd2Rh2 trigonal pyramid, and  an edgeedge with one O(5)Nd2Rh2 trigonal pyramid. In the third O site, O(3) is bonded to one Nd(1), one Nd(4), one Rh(1), and one Rh(2) atom to form distorted ONd2Rh2 trigonal pyramids that share  a cornercorner with one O(4)CaNd3Rh square pyramid, corners with two equivalent O(7)Nd2Rh2 tetrahedra, corners with four equivalent O(2)Nd3Rh2 trigonal bipyramids, corners with two equivalent O(3)Nd2Rh2 trigonal pyramids, corners with two equivalent O(5)Nd2Rh2 trigonal pyramids,  an edgeedge with one O(8)CaNd2Rh2 square pyramid,  an edgeedge with one O(4)CaNd3Rh square pyramid,  an edgeedge with one O(6)CaNd2Rh2 trigonal bipyramid, and  an edgeedge with one O(2)Nd3Rh2 trigonal bipyramid. In the fourth O site, O(4) is bonded to one Ca(1), one Nd(1), one Nd(2), one Nd(3), and one Rh(1) atom to form distorted OCaNd3Rh square pyramids that share  a cornercorner with one O(8)CaNd2Rh2 square pyramid,  a cornercorner with one O(4)CaNd3Rh square pyramid,  a cornercorner with one O(7)Nd2Rh2 tetrahedra, corners with three equivalent O(6)CaNd2Rh2 trigonal bipyramids, corners with three equivalent O(2)Nd3Rh2 trigonal bipyramids,  a cornercorner with one O(3)Nd2Rh2 trigonal pyramid,  an edgeedge with one O(2)Nd3Rh2 trigonal bipyramid,  an edgeedge with one O(3)Nd2Rh2 trigonal pyramid,  an edgeedge with one O(5)Nd2Rh2 trigonal pyramid,  a faceface with one O(8)CaNd2Rh2 square pyramid, and  a faceface with one O(4)CaNd3Rh square pyramid. In the fifth O site, O(5) is bonded to one Nd(2), one Nd(4), and two equivalent Rh(1) atoms to form distorted ONd2Rh2 trigonal pyramids that share corners with two equivalent O(8)CaNd2Rh2 square pyramids, corners with two equivalent O(7)Nd2Rh2 tetrahedra, corners with four equivalent O(3)Nd2Rh2 trigonal pyramids, edges with two equivalent O(4)CaNd3Rh square pyramids, and edges with two equivalent O(2)Nd3Rh2 trigonal bipyramids. In the sixth O site, O(6) is bonded to one Ca(1), one Nd(1), one Nd(3), and two equivalent Rh(2) atoms to form distorted OCaNd2Rh2 trigonal bipyramids that share  a cornercorner with one O(8)CaNd2Rh2 square pyramid, corners with six equivalent O(4)CaNd3Rh square pyramids, corners with two equivalent O(7)Nd2Rh2 tetrahedra, corners with two equivalent O(2)Nd3Rh2 trigonal bipyramids,  an edgeedge with one O(8)CaNd2Rh2 square pyramid, edges with two equivalent O(2)Nd3Rh2 trigonal bipyramids, and edges with two equivalent O(3)Nd2Rh2 trigonal pyramids. In the seventh O site, O(7) is bonded to one Nd(2), one Nd(4), and two equivalent Rh(2) atoms to form ONd2Rh2 tetrahedra that share corners with two equivalent O(4)CaNd3Rh square pyramids, corners with two equivalent O(6)CaNd2Rh2 trigonal bipyramids, corners with two equivalent O(5)Nd2Rh2 trigonal pyramids, corners with four equivalent O(3)Nd2Rh2 trigonal pyramids, and edges with two equivalent O(2)Nd3Rh2 trigonal bipyramids. In the eighth O site, O(8) is bonded to one Ca(1), one Nd(1), one Nd(3), and two equivalent Rh(1) atoms to form distorted OCaNd2Rh2 square pyramids that share corners with two equivalent O(4)CaNd3Rh square pyramids,  a cornercorner with one O(6)CaNd2Rh2 trigonal bipyramid, corners with two equivalent O(2)Nd3Rh2 trigonal bipyramids, corners with two equivalent O(5)Nd2Rh2 trigonal pyramids,  an edgeedge with one O(6)CaNd2Rh2 trigonal bipyramid, edges with two equivalent O(2)Nd3Rh2 trigonal bipyramids, edges with two equivalent O(3)Nd2Rh2 trigonal pyramids, and faces with two equivalent O(4)CaNd3Rh square pyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_CaNd4(RhO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.318
_cell_length_b   6.308
_cell_length_c   7.454
_cell_angle_alpha   89.999
_cell_angle_beta   89.998
_cell_angle_gamma   72.114
_symmetry_Int_Tables_number   1
_cell_volume   282.724
_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
  Ca  Ca0  1  0.916  0.842  0.750  1.0
  Nd  Nd1  1  0.489  0.568  0.750  1.0
  Nd  Nd2  1  0.045  0.947  0.250  1.0
  Nd  Nd3  1  0.167  0.161  0.750  1.0
  Nd  Nd4  1  0.522  0.388  0.250  1.0
  Rh  Rh5  1  0.495  0.978  0.487  1.0
  Rh  Rh6  1  0.977  0.503  0.475  1.0
  Rh  Rh7  1  0.977  0.503  0.025  1.0
  Rh  Rh8  1  0.495  0.978  0.013  1.0
  O  O9  1  0.754  0.101  0.452  1.0
  O  O10  1  0.326  0.337  0.539  1.0
  O  O11  1  0.651  0.646  0.054  1.0
  O  O12  1  0.226  0.853  0.948  1.0
  O  O13  1  0.226  0.853  0.552  1.0
  O  O14  1  0.651  0.646  0.446  1.0
  O  O15  1  0.326  0.337  0.961  1.0
  O  O16  1  0.754  0.101  0.048  1.0
  O  O17  1  0.375  0.059  0.250  1.0
  O  O18  1  0.880  0.488  0.750  1.0
  O  O19  1  0.108  0.562  0.250  1.0
  O  O20  1  0.564  0.919  0.750  1.0
[/CIF]
.