The compound described by Dy2RhSi3 crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded to twelve equivalent Si(1) atoms to form DySi12 cuboctahedra that share edges with twelve equivalent Dy(2)Si8Rh4 cuboctahedra, faces with two equivalent Dy(1)Si12 cuboctahedra, and faces with six equivalent Dy(2)Si8Rh4 cuboctahedra. In the second Dy site, Dy(2) is bonded to four equivalent Rh(1) and eight equivalent Si(1) atoms to form distorted DySi8Rh4 cuboctahedra that share edges with four equivalent Dy(1)Si12 cuboctahedra, edges with eight equivalent Dy(2)Si8Rh4 cuboctahedra, faces with two equivalent Dy(1)Si12 cuboctahedra, and faces with six equivalent Dy(2)Si8Rh4 cuboctahedra. Rh(1) is bonded in a 9-coordinate geometry to six equivalent Dy(2) and three equivalent Si(1) atoms. Si(1) is bonded in a 9-coordinate geometry to two equivalent Dy(1), four equivalent Dy(2), one Rh(1), and two equivalent Si(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Dy2Si3Rh
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.182
_cell_length_b   8.182
_cell_length_c   7.911
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   458.647
_cell_formula_units_Z   4
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
  Dy  Dy0  1  0.000  0.000  0.250  1.0
  Dy  Dy1  1  0.000  0.000  0.750  1.0
  Dy  Dy2  1  0.509  0.491  0.250  1.0
  Dy  Dy3  1  0.509  0.018  0.250  1.0
  Dy  Dy4  1  0.982  0.491  0.250  1.0
  Dy  Dy5  1  0.491  0.509  0.750  1.0
  Dy  Dy6  1  0.491  0.982  0.750  1.0
  Dy  Dy7  1  0.018  0.509  0.750  1.0
  Si  Si8  1  0.167  0.833  0.499  1.0
  Si  Si9  1  0.167  0.334  0.499  1.0
  Si  Si10  1  0.666  0.833  0.499  1.0
  Si  Si11  1  0.833  0.167  0.501  1.0
  Si  Si12  1  0.833  0.666  0.501  1.0
  Si  Si13  1  0.334  0.167  0.501  1.0
  Si  Si14  1  0.833  0.167  0.999  1.0
  Si  Si15  1  0.833  0.666  0.999  1.0
  Si  Si16  1  0.334  0.167  0.999  1.0
  Si  Si17  1  0.167  0.833  0.001  1.0
  Si  Si18  1  0.167  0.334  0.001  1.0
  Si  Si19  1  0.666  0.833  0.001  1.0
  Rh  Rh20  1  0.333  0.667  0.468  1.0
  Rh  Rh21  1  0.667  0.333  0.532  1.0
  Rh  Rh22  1  0.667  0.333  0.968  1.0
  Rh  Rh23  1  0.333  0.667  0.032  1.0
[/CIF]
.
The compound described by Dy2RhSi3 crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded to twelve equivalent Si(1) atoms to form DySi12 cuboctahedra that share edges with twelve equivalent Dy(2)Si8Rh4 cuboctahedra, faces with two equivalent Dy(1)Si12 cuboctahedra, and faces with six equivalent Dy(2)Si8Rh4 cuboctahedra. In the second Dy site, Dy(2) is bonded to four equivalent Rh(1) and eight equivalent Si(1) atoms to form distorted DySi8Rh4 cuboctahedra that share edges with four equivalent Dy(1)Si12 cuboctahedra, edges with eight equivalent Dy(2)Si8Rh4 cuboctahedra, faces with two equivalent Dy(1)Si12 cuboctahedra, and faces with six equivalent Dy(2)Si8Rh4 cuboctahedra. Rh(1) is bonded in a 9-coordinate geometry to six equivalent Dy(2) and three equivalent Si(1) atoms. Si(1) is bonded in a 9-coordinate geometry to two equivalent Dy(1), four equivalent Dy(2), one Rh(1), and two equivalent Si(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Dy2Si3Rh
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.182
_cell_length_b   8.182
_cell_length_c   7.911
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   458.647
_cell_formula_units_Z   4
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
  Dy  Dy0  1  0.000  0.000  0.250  1.0
  Dy  Dy1  1  0.000  0.000  0.750  1.0
  Dy  Dy2  1  0.509  0.491  0.250  1.0
  Dy  Dy3  1  0.509  0.018  0.250  1.0
  Dy  Dy4  1  0.982  0.491  0.250  1.0
  Dy  Dy5  1  0.491  0.509  0.750  1.0
  Dy  Dy6  1  0.491  0.982  0.750  1.0
  Dy  Dy7  1  0.018  0.509  0.750  1.0
  Si  Si8  1  0.167  0.833  0.499  1.0
  Si  Si9  1  0.167  0.334  0.499  1.0
  Si  Si10  1  0.666  0.833  0.499  1.0
  Si  Si11  1  0.833  0.167  0.501  1.0
  Si  Si12  1  0.833  0.666  0.501  1.0
  Si  Si13  1  0.334  0.167  0.501  1.0
  Si  Si14  1  0.833  0.167  0.999  1.0
  Si  Si15  1  0.833  0.666  0.999  1.0
  Si  Si16  1  0.334  0.167  0.999  1.0
  Si  Si17  1  0.167  0.833  0.001  1.0
  Si  Si18  1  0.167  0.334  0.001  1.0
  Si  Si19  1  0.666  0.833  0.001  1.0
  Rh  Rh20  1  0.333  0.667  0.468  1.0
  Rh  Rh21  1  0.667  0.333  0.532  1.0
  Rh  Rh22  1  0.667  0.333  0.968  1.0
  Rh  Rh23  1  0.333  0.667  0.032  1.0
[/CIF]
.