The structure described by MgRhSbO4 crystallizes in the monoclinic Pm space group. Mg(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form distorted MgO4 tetrahedra that share corners with four equivalent Rh(1)O6 octahedra, corners with two equivalent Mg(1)O4 tetrahedra, and  an edgeedge with one Rh(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 8-53°. Rh(1) is bonded to one O(2), one O(3), two equivalent O(1), and two equivalent O(4) atoms to form RhO6 octahedra that share corners with four equivalent Mg(1)O4 tetrahedra, edges with two equivalent Rh(1)O6 octahedra, and  an edgeedge with one Mg(1)O4 tetrahedra. Sb(1) is bonded in a 5-coordinate geometry to one O(4), two equivalent O(2), and two equivalent O(3) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to two equivalent Mg(1) and two equivalent Rh(1) atoms. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Rh(1), and two equivalent Sb(1) atoms. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Rh(1), and two equivalent Sb(1) atoms. In the fourth O site, O(4) is bonded in a trigonal planar geometry to two equivalent Rh(1) and one Sb(1) atom. is represented by the CIF file [CIF]
data_MgSbRhO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.155
_cell_length_b   5.553
_cell_length_c   5.553
_cell_angle_alpha   72.181
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   92.619
_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
  Mg  Mg0  1  0.500  0.216  0.211  1.0
  Sb  Sb1  1  0.000  0.906  0.907  1.0
  Rh  Rh2  1  0.500  0.521  0.519  1.0
  O  O3  1  0.000  0.349  0.342  1.0
  O  O4  1  0.500  0.842  0.214  1.0
  O  O5  1  0.500  0.213  0.838  1.0
  O  O6  1  0.000  0.661  0.663  1.0
[/CIF]
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The structure described by MgRhSbO4 crystallizes in the monoclinic Pm space group. Mg(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form distorted MgO4 tetrahedra that share corners with four equivalent Rh(1)O6 octahedra, corners with two equivalent Mg(1)O4 tetrahedra, and  an edgeedge with one Rh(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 8-53°. Rh(1) is bonded to one O(2), one O(3), two equivalent O(1), and two equivalent O(4) atoms to form RhO6 octahedra that share corners with four equivalent Mg(1)O4 tetrahedra, edges with two equivalent Rh(1)O6 octahedra, and  an edgeedge with one Mg(1)O4 tetrahedra. Sb(1) is bonded in a 5-coordinate geometry to one O(4), two equivalent O(2), and two equivalent O(3) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to two equivalent Mg(1) and two equivalent Rh(1) atoms. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Rh(1), and two equivalent Sb(1) atoms. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Rh(1), and two equivalent Sb(1) atoms. In the fourth O site, O(4) is bonded in a trigonal planar geometry to two equivalent Rh(1) and one Sb(1) atom. is represented by the CIF file [CIF]
data_MgSbRhO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.155
_cell_length_b   5.553
_cell_length_c   5.553
_cell_angle_alpha   72.181
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   92.619
_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
  Mg  Mg0  1  0.500  0.216  0.211  1.0
  Sb  Sb1  1  0.000  0.906  0.907  1.0
  Rh  Rh2  1  0.500  0.521  0.519  1.0
  O  O3  1  0.000  0.349  0.342  1.0
  O  O4  1  0.500  0.842  0.214  1.0
  O  O5  1  0.500  0.213  0.838  1.0
  O  O6  1  0.000  0.661  0.663  1.0
[/CIF]
.