The crystal structure described by Ce3(MgRh2)2 crystallizes in the orthorhombic Amm2 space group. Mg(1) is bonded to one Rh(3), two equivalent Rh(1), and two equivalent Rh(2) atoms to form a mixture of distorted face and corner-sharing MgRh5 tetrahedra. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 7-coordinate geometry to one Rh(2), two equivalent Rh(3), and four equivalent Rh(1) atoms. In the second Ce site, Ce(2) is bonded in a 7-coordinate geometry to one Rh(2), two equivalent Rh(3), and four equivalent Rh(1) atoms. There are three inequivalent Rh sites. In the first Rh site, Rh(1) is bonded in a 8-coordinate geometry to two equivalent Mg(1), two equivalent Ce(1), four equivalent Ce(2), and one Rh(3) atom. In the second Rh site, Rh(2) is bonded in a 7-coordinate geometry to four equivalent Mg(1), one Ce(1), two equivalent Ce(2), and two equivalent Rh(3) atoms. In the third Rh site, Rh(3) is bonded in a 12-coordinate geometry to two equivalent Mg(1), two equivalent Ce(1), four equivalent Ce(2), two equivalent Rh(1), and two equivalent Rh(2) atoms. is represented by the CIF file [CIF]
data_Ce3(MgRh2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.216
_cell_length_b   7.216
_cell_length_c   3.913
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   114.552
_symmetry_Int_Tables_number   1
_cell_volume   185.359
_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
  Ce  Ce0  1  0.423  0.423  0.000  1.0
  Ce  Ce1  1  0.615  0.964  0.000  1.0
  Ce  Ce2  1  0.964  0.615  0.000  1.0
  Mg  Mg3  1  0.257  0.999  0.500  1.0
  Mg  Mg4  1  0.999  0.257  0.500  1.0
  Rh  Rh5  1  0.308  0.644  0.500  1.0
  Rh  Rh6  1  0.644  0.308  0.500  1.0
  Rh  Rh7  1  0.029  0.029  0.000  1.0
  Rh  Rh8  1  0.760  0.760  0.500  1.0
[/CIF]
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The crystal structure described by Ce3(MgRh2)2 crystallizes in the orthorhombic Amm2 space group. Mg(1) is bonded to one Rh(3), two equivalent Rh(1), and two equivalent Rh(2) atoms to form a mixture of distorted face and corner-sharing MgRh5 tetrahedra. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 7-coordinate geometry to one Rh(2), two equivalent Rh(3), and four equivalent Rh(1) atoms. In the second Ce site, Ce(2) is bonded in a 7-coordinate geometry to one Rh(2), two equivalent Rh(3), and four equivalent Rh(1) atoms. There are three inequivalent Rh sites. In the first Rh site, Rh(1) is bonded in a 8-coordinate geometry to two equivalent Mg(1), two equivalent Ce(1), four equivalent Ce(2), and one Rh(3) atom. In the second Rh site, Rh(2) is bonded in a 7-coordinate geometry to four equivalent Mg(1), one Ce(1), two equivalent Ce(2), and two equivalent Rh(3) atoms. In the third Rh site, Rh(3) is bonded in a 12-coordinate geometry to two equivalent Mg(1), two equivalent Ce(1), four equivalent Ce(2), two equivalent Rh(1), and two equivalent Rh(2) atoms. is represented by the CIF file [CIF]
data_Ce3(MgRh2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.216
_cell_length_b   7.216
_cell_length_c   3.913
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   114.552
_symmetry_Int_Tables_number   1
_cell_volume   185.359
_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
  Ce  Ce0  1  0.423  0.423  0.000  1.0
  Ce  Ce1  1  0.615  0.964  0.000  1.0
  Ce  Ce2  1  0.964  0.615  0.000  1.0
  Mg  Mg3  1  0.257  0.999  0.500  1.0
  Mg  Mg4  1  0.999  0.257  0.500  1.0
  Rh  Rh5  1  0.308  0.644  0.500  1.0
  Rh  Rh6  1  0.644  0.308  0.500  1.0
  Rh  Rh7  1  0.029  0.029  0.000  1.0
  Rh  Rh8  1  0.760  0.760  0.500  1.0
[/CIF]
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