The material structure described by MgMo2(RhO3)4 crystallizes in the monoclinic P2 space group. Mg(1) is bonded in a 4-coordinate geometry to two equivalent O(2), two equivalent O(3), and two equivalent O(5) atoms. There are two inequivalent Mo sites. In the first Mo site, Mo(1) is bonded to two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms to form MoO6 octahedra that share corners with four equivalent Rh(1)O6 octahedra, corners with four equivalent Rh(3)O6 octahedra,  an edgeedge with one Rh(2)O6 octahedra, and  an edgeedge with one Rh(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 44-54°. In the second Mo site, Mo(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(6) atoms to form MoO6 octahedra that share corners with four equivalent Rh(2)O6 octahedra, corners with four equivalent Rh(4)O6 octahedra,  an edgeedge with one Rh(1)O6 octahedra, and  an edgeedge with one Rh(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 46-52°. There are four inequivalent Rh sites. In the first Rh site, Rh(1) is bonded to two equivalent O(1), two equivalent O(4), and two equivalent O(5) atoms to form RhO6 octahedra that share corners with four equivalent Mo(1)O6 octahedra, corners with four equivalent Rh(4)O6 octahedra,  an edgeedge with one Mo(2)O6 octahedra, and  an edgeedge with one Rh(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-54°. In the second Rh site, Rh(2) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(6) atoms to form RhO6 octahedra that share corners with four equivalent Mo(2)O6 octahedra, corners with four equivalent Rh(3)O6 octahedra,  an edgeedge with one Mo(1)O6 octahedra, and  an edgeedge with one Rh(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 46-53°. In the third Rh site, Rh(3) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(5) atoms to form distorted RhO6 octahedra that share corners with four equivalent Mo(1)O6 octahedra, corners with four equivalent Rh(2)O6 octahedra,  an edgeedge with one Mo(2)O6 octahedra, and  an edgeedge with one Rh(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 44-53°. In the fourth Rh site, Rh(4) is bonded to two equivalent O(1), two equivalent O(4), and two equivalent O(6) atoms to form RhO6 octahedra that share corners with four equivalent Mo(2)O6 octahedra, corners with four equivalent Rh(1)O6 octahedra,  an edgeedge with one Mo(1)O6 octahedra, and  an edgeedge with one Rh(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-51°. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Mo(2), one Rh(1), and one Rh(4) atom. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Mo(2), one Rh(2), and one Rh(3) atom. In the third O site, O(3) is bonded to one Mg(1), one Mo(1), one Rh(2), and one Rh(3) atom to form a mixture of distorted edge and corner-sharing OMgMoRh2 trigonal pyramids. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Mo(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 Mg(1), one Mo(1), one Rh(1), and one Rh(3) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Mo(2), one Rh(2), and one Rh(4) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgMo2(RhO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.751
_cell_length_b   4.782
_cell_length_c   9.390
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   89.459
_symmetry_Int_Tables_number   1
_cell_volume   213.341
_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  0.000  0.196  1.0
  Mo  Mo1  1  0.000  0.000  0.982  1.0
  Mo  Mo2  1  0.500  0.500  0.502  1.0
  Rh  Rh3  1  0.500  0.500  0.827  1.0
  Rh  Rh4  1  0.000  0.000  0.332  1.0
  Rh  Rh5  1  0.500  0.500  0.160  1.0
  Rh  Rh6  1  0.000  0.000  0.660  1.0
  O  O7  1  0.686  0.702  0.659  1.0
  O  O8  1  0.314  0.298  0.659  1.0
  O  O9  1  0.670  0.719  0.330  1.0
  O  O10  1  0.168  0.784  0.157  1.0
  O  O11  1  0.832  0.216  0.157  1.0
  O  O12  1  0.814  0.206  0.828  1.0
  O  O13  1  0.319  0.273  0.998  1.0
  O  O14  1  0.189  0.784  0.494  1.0
  O  O15  1  0.811  0.216  0.494  1.0
  O  O16  1  0.681  0.727  0.998  1.0
  O  O17  1  0.330  0.281  0.330  1.0
  O  O18  1  0.186  0.794  0.828  1.0
[/CIF]
.
The material structure described by MgMo2(RhO3)4 crystallizes in the monoclinic P2 space group. Mg(1) is bonded in a 4-coordinate geometry to two equivalent O(2), two equivalent O(3), and two equivalent O(5) atoms. There are two inequivalent Mo sites. In the first Mo site, Mo(1) is bonded to two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms to form MoO6 octahedra that share corners with four equivalent Rh(1)O6 octahedra, corners with four equivalent Rh(3)O6 octahedra,  an edgeedge with one Rh(2)O6 octahedra, and  an edgeedge with one Rh(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 44-54°. In the second Mo site, Mo(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(6) atoms to form MoO6 octahedra that share corners with four equivalent Rh(2)O6 octahedra, corners with four equivalent Rh(4)O6 octahedra,  an edgeedge with one Rh(1)O6 octahedra, and  an edgeedge with one Rh(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 46-52°. There are four inequivalent Rh sites. In the first Rh site, Rh(1) is bonded to two equivalent O(1), two equivalent O(4), and two equivalent O(5) atoms to form RhO6 octahedra that share corners with four equivalent Mo(1)O6 octahedra, corners with four equivalent Rh(4)O6 octahedra,  an edgeedge with one Mo(2)O6 octahedra, and  an edgeedge with one Rh(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-54°. In the second Rh site, Rh(2) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(6) atoms to form RhO6 octahedra that share corners with four equivalent Mo(2)O6 octahedra, corners with four equivalent Rh(3)O6 octahedra,  an edgeedge with one Mo(1)O6 octahedra, and  an edgeedge with one Rh(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 46-53°. In the third Rh site, Rh(3) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(5) atoms to form distorted RhO6 octahedra that share corners with four equivalent Mo(1)O6 octahedra, corners with four equivalent Rh(2)O6 octahedra,  an edgeedge with one Mo(2)O6 octahedra, and  an edgeedge with one Rh(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 44-53°. In the fourth Rh site, Rh(4) is bonded to two equivalent O(1), two equivalent O(4), and two equivalent O(6) atoms to form RhO6 octahedra that share corners with four equivalent Mo(2)O6 octahedra, corners with four equivalent Rh(1)O6 octahedra,  an edgeedge with one Mo(1)O6 octahedra, and  an edgeedge with one Rh(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-51°. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Mo(2), one Rh(1), and one Rh(4) atom. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Mo(2), one Rh(2), and one Rh(3) atom. In the third O site, O(3) is bonded to one Mg(1), one Mo(1), one Rh(2), and one Rh(3) atom to form a mixture of distorted edge and corner-sharing OMgMoRh2 trigonal pyramids. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Mo(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 Mg(1), one Mo(1), one Rh(1), and one Rh(3) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Mo(2), one Rh(2), and one Rh(4) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgMo2(RhO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.751
_cell_length_b   4.782
_cell_length_c   9.390
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   89.459
_symmetry_Int_Tables_number   1
_cell_volume   213.341
_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  0.000  0.196  1.0
  Mo  Mo1  1  0.000  0.000  0.982  1.0
  Mo  Mo2  1  0.500  0.500  0.502  1.0
  Rh  Rh3  1  0.500  0.500  0.827  1.0
  Rh  Rh4  1  0.000  0.000  0.332  1.0
  Rh  Rh5  1  0.500  0.500  0.160  1.0
  Rh  Rh6  1  0.000  0.000  0.660  1.0
  O  O7  1  0.686  0.702  0.659  1.0
  O  O8  1  0.314  0.298  0.659  1.0
  O  O9  1  0.670  0.719  0.330  1.0
  O  O10  1  0.168  0.784  0.157  1.0
  O  O11  1  0.832  0.216  0.157  1.0
  O  O12  1  0.814  0.206  0.828  1.0
  O  O13  1  0.319  0.273  0.998  1.0
  O  O14  1  0.189  0.784  0.494  1.0
  O  O15  1  0.811  0.216  0.494  1.0
  O  O16  1  0.681  0.727  0.998  1.0
  O  O17  1  0.330  0.281  0.330  1.0
  O  O18  1  0.186  0.794  0.828  1.0
[/CIF]
.