The compound described by Er4Rh7Ge6 crystallizes in the cubic Im-3m space group. Er(1) is bonded to six equivalent Rh(1) and six equivalent Ge(1) atoms to form ErGe6Rh6 cuboctahedra that share corners with twelve equivalent Er(1)Ge6Rh6 cuboctahedra, faces with six equivalent Er(1)Ge6Rh6 cuboctahedra, and faces with two equivalent Rh(2)Ge6 octahedra. There are two inequivalent Rh sites. In the first Rh site, Rh(2) is bonded to six equivalent Ge(1) atoms to form RhGe6 octahedra that share faces with eight equivalent Er(1)Ge6Rh6 cuboctahedra. In the second Rh site, Rh(1) is bonded in a 8-coordinate geometry to four equivalent Er(1) and four equivalent Ge(1) atoms. Ge(1) is bonded in a 9-coordinate geometry to four equivalent Er(1), one Rh(2), and four equivalent Rh(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Er4Ge6Rh7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.189
_cell_length_b   7.189
_cell_length_c   7.189
_cell_angle_alpha   109.471
_cell_angle_beta   109.471
_cell_angle_gamma   109.471
_symmetry_Int_Tables_number   1
_cell_volume   286.028
_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
  Er  Er0  1  0.000  0.000  0.500  1.0
  Er  Er1  1  0.000  0.500  0.000  1.0
  Er  Er2  1  0.500  0.000  0.000  1.0
  Er  Er3  1  0.500  0.500  0.500  1.0
  Ge  Ge4  1  0.679  0.679  0.000  1.0
  Ge  Ge5  1  0.321  0.000  0.321  1.0
  Ge  Ge6  1  0.000  0.321  0.321  1.0
  Ge  Ge7  1  0.321  0.321  0.000  1.0
  Ge  Ge8  1  0.679  0.000  0.679  1.0
  Ge  Ge9  1  0.000  0.679  0.679  1.0
  Rh  Rh10  1  0.750  0.250  0.500  1.0
  Rh  Rh11  1  0.750  0.500  0.250  1.0
  Rh  Rh12  1  0.500  0.250  0.750  1.0
  Rh  Rh13  1  0.250  0.500  0.750  1.0
  Rh  Rh14  1  0.250  0.750  0.500  1.0
  Rh  Rh15  1  0.500  0.750  0.250  1.0
  Rh  Rh16  1  0.000  0.000  0.000  1.0
[/CIF]
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The compound described by Er4Rh7Ge6 crystallizes in the cubic Im-3m space group. Er(1) is bonded to six equivalent Rh(1) and six equivalent Ge(1) atoms to form ErGe6Rh6 cuboctahedra that share corners with twelve equivalent Er(1)Ge6Rh6 cuboctahedra, faces with six equivalent Er(1)Ge6Rh6 cuboctahedra, and faces with two equivalent Rh(2)Ge6 octahedra. There are two inequivalent Rh sites. In the first Rh site, Rh(2) is bonded to six equivalent Ge(1) atoms to form RhGe6 octahedra that share faces with eight equivalent Er(1)Ge6Rh6 cuboctahedra. In the second Rh site, Rh(1) is bonded in a 8-coordinate geometry to four equivalent Er(1) and four equivalent Ge(1) atoms. Ge(1) is bonded in a 9-coordinate geometry to four equivalent Er(1), one Rh(2), and four equivalent Rh(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Er4Ge6Rh7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.189
_cell_length_b   7.189
_cell_length_c   7.189
_cell_angle_alpha   109.471
_cell_angle_beta   109.471
_cell_angle_gamma   109.471
_symmetry_Int_Tables_number   1
_cell_volume   286.028
_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
  Er  Er0  1  0.000  0.000  0.500  1.0
  Er  Er1  1  0.000  0.500  0.000  1.0
  Er  Er2  1  0.500  0.000  0.000  1.0
  Er  Er3  1  0.500  0.500  0.500  1.0
  Ge  Ge4  1  0.679  0.679  0.000  1.0
  Ge  Ge5  1  0.321  0.000  0.321  1.0
  Ge  Ge6  1  0.000  0.321  0.321  1.0
  Ge  Ge7  1  0.321  0.321  0.000  1.0
  Ge  Ge8  1  0.679  0.000  0.679  1.0
  Ge  Ge9  1  0.000  0.679  0.679  1.0
  Rh  Rh10  1  0.750  0.250  0.500  1.0
  Rh  Rh11  1  0.750  0.500  0.250  1.0
  Rh  Rh12  1  0.500  0.250  0.750  1.0
  Rh  Rh13  1  0.250  0.500  0.750  1.0
  Rh  Rh14  1  0.250  0.750  0.500  1.0
  Rh  Rh15  1  0.500  0.750  0.250  1.0
  Rh  Rh16  1  0.000  0.000  0.000  1.0
[/CIF]
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