The compound described by Er2Rh12P7 crystallizes in the trigonal P-3 space group. Er(1) is bonded to six equivalent Rh(1) and six equivalent P(2) atoms to form distorted ErP6Rh6 cuboctahedra that share corners with twelve equivalent Rh(2)P4 tetrahedra, edges with three equivalent Rh(2)P4 tetrahedra, and faces with two equivalent Er(1)P6Rh6 cuboctahedra. There are two inequivalent Rh sites. In the first Rh site, Rh(1) is bonded in a 6-coordinate geometry to two equivalent Er(1) and four equivalent P(2) atoms. In the second Rh site, Rh(2) is bonded to one P(1) and three equivalent P(2) atoms to form distorted RhP4 tetrahedra that share corners with four equivalent Er(1)P6Rh6 cuboctahedra, corners with seven equivalent Rh(2)P4 tetrahedra,  an edgeedge with one Er(1)P6Rh6 cuboctahedra, and edges with two equivalent Rh(2)P4 tetrahedra. There are two inequivalent P sites. In the first P site, P(1) is bonded in a distorted octahedral geometry to six equivalent Rh(2) atoms. In the second P site, P(2) is bonded in a 9-coordinate geometry to two equivalent Er(1), three equivalent Rh(2), and four equivalent Rh(1) atoms. is represented by the CIF file [CIF]
data_Er2P7Rh12
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.515
_cell_length_b   9.515
_cell_length_c   3.844
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   301.384
_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  0.333  0.667  0.750  1.0
  Er  Er1  1  0.667  0.333  0.250  1.0
  P  P2  1  0.000  1.000  0.500  1.0
  P  P3  1  0.406  0.285  0.755  1.0
  P  P4  1  0.714  0.121  0.755  1.0
  P  P5  1  0.879  0.594  0.755  1.0
  P  P6  1  0.594  0.714  0.245  1.0
  P  P7  1  0.285  0.879  0.245  1.0
  P  P8  1  0.121  0.406  0.245  1.0
  Rh  Rh9  1  0.451  0.069  0.750  1.0
  Rh  Rh10  1  0.931  0.382  0.750  1.0
  Rh  Rh11  1  0.618  0.549  0.750  1.0
  Rh  Rh12  1  0.549  0.931  0.250  1.0
  Rh  Rh13  1  0.069  0.618  0.250  1.0
  Rh  Rh14  1  0.382  0.451  0.250  1.0
  Rh  Rh15  1  0.152  0.261  0.750  1.0
  Rh  Rh16  1  0.739  0.891  0.750  1.0
  Rh  Rh17  1  0.109  0.848  0.750  1.0
  Rh  Rh18  1  0.848  0.739  0.250  1.0
  Rh  Rh19  1  0.261  0.109  0.250  1.0
  Rh  Rh20  1  0.891  0.152  0.250  1.0
[/CIF]
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The compound described by Er2Rh12P7 crystallizes in the trigonal P-3 space group. Er(1) is bonded to six equivalent Rh(1) and six equivalent P(2) atoms to form distorted ErP6Rh6 cuboctahedra that share corners with twelve equivalent Rh(2)P4 tetrahedra, edges with three equivalent Rh(2)P4 tetrahedra, and faces with two equivalent Er(1)P6Rh6 cuboctahedra. There are two inequivalent Rh sites. In the first Rh site, Rh(1) is bonded in a 6-coordinate geometry to two equivalent Er(1) and four equivalent P(2) atoms. In the second Rh site, Rh(2) is bonded to one P(1) and three equivalent P(2) atoms to form distorted RhP4 tetrahedra that share corners with four equivalent Er(1)P6Rh6 cuboctahedra, corners with seven equivalent Rh(2)P4 tetrahedra,  an edgeedge with one Er(1)P6Rh6 cuboctahedra, and edges with two equivalent Rh(2)P4 tetrahedra. There are two inequivalent P sites. In the first P site, P(1) is bonded in a distorted octahedral geometry to six equivalent Rh(2) atoms. In the second P site, P(2) is bonded in a 9-coordinate geometry to two equivalent Er(1), three equivalent Rh(2), and four equivalent Rh(1) atoms. is represented by the CIF file [CIF]
data_Er2P7Rh12
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.515
_cell_length_b   9.515
_cell_length_c   3.844
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   301.384
_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  0.333  0.667  0.750  1.0
  Er  Er1  1  0.667  0.333  0.250  1.0
  P  P2  1  0.000  1.000  0.500  1.0
  P  P3  1  0.406  0.285  0.755  1.0
  P  P4  1  0.714  0.121  0.755  1.0
  P  P5  1  0.879  0.594  0.755  1.0
  P  P6  1  0.594  0.714  0.245  1.0
  P  P7  1  0.285  0.879  0.245  1.0
  P  P8  1  0.121  0.406  0.245  1.0
  Rh  Rh9  1  0.451  0.069  0.750  1.0
  Rh  Rh10  1  0.931  0.382  0.750  1.0
  Rh  Rh11  1  0.618  0.549  0.750  1.0
  Rh  Rh12  1  0.549  0.931  0.250  1.0
  Rh  Rh13  1  0.069  0.618  0.250  1.0
  Rh  Rh14  1  0.382  0.451  0.250  1.0
  Rh  Rh15  1  0.152  0.261  0.750  1.0
  Rh  Rh16  1  0.739  0.891  0.750  1.0
  Rh  Rh17  1  0.109  0.848  0.750  1.0
  Rh  Rh18  1  0.848  0.739  0.250  1.0
  Rh  Rh19  1  0.261  0.109  0.250  1.0
  Rh  Rh20  1  0.891  0.152  0.250  1.0
[/CIF]
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