The structure described by Rh3Si4 crystallizes in the orthorhombic Pnma space group. There are three inequivalent Rh sites. In the first Rh site, Rh(1) is bonded in a 7-coordinate geometry to one Si(1), three equivalent Si(3), and three equivalent Si(4) atoms. In the second Rh site, Rh(2) is bonded in a 6-coordinate geometry to one Si(1), two equivalent Si(3), and three equivalent Si(2) atoms. In the third Rh site, Rh(3) is bonded in a 7-coordinate geometry to one Si(3), one Si(4), two equivalent Si(1), and three equivalent Si(2) atoms. There are four inequivalent Si sites. In the first Si site, Si(1) is bonded in a 4-coordinate geometry to one Rh(1), one Rh(2), and two equivalent Rh(3) atoms. In the second Si site, Si(2) is bonded in a 6-coordinate geometry to three equivalent Rh(2) and three equivalent Rh(3) atoms. In the third Si site, Si(3) is bonded in a 6-coordinate geometry to one Rh(3), two equivalent Rh(2), and three equivalent Rh(1) atoms. In the fourth Si site, Si(4) is bonded to one Rh(3) and three equivalent Rh(1) atoms to form a mixture of distorted edge and corner-sharing SiRh4 tetrahedra. is represented by the CIF file [CIF]
data_Si4Rh3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.622
_cell_length_b   5.828
_cell_length_c   18.832
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   397.571
_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
  Si  Si0  1  0.250  0.387  0.143  1.0
  Si  Si1  1  0.750  0.613  0.857  1.0
  Si  Si2  1  0.750  0.887  0.357  1.0
  Si  Si3  1  0.250  0.113  0.643  1.0
  Si  Si4  1  0.750  0.221  0.232  1.0
  Si  Si5  1  0.250  0.779  0.768  1.0
  Si  Si6  1  0.250  0.721  0.268  1.0
  Si  Si7  1  0.750  0.279  0.732  1.0
  Si  Si8  1  0.250  0.429  0.410  1.0
  Si  Si9  1  0.750  0.571  0.590  1.0
  Si  Si10  1  0.750  0.929  0.090  1.0
  Si  Si11  1  0.250  0.071  0.910  1.0
  Si  Si12  1  0.750  0.480  0.049  1.0
  Si  Si13  1  0.250  0.520  0.951  1.0
  Si  Si14  1  0.250  0.980  0.451  1.0
  Si  Si15  1  0.750  0.020  0.549  1.0
  Rh  Rh16  1  0.250  0.189  0.032  1.0
  Rh  Rh17  1  0.750  0.811  0.968  1.0
  Rh  Rh18  1  0.750  0.689  0.468  1.0
  Rh  Rh19  1  0.250  0.311  0.532  1.0
  Rh  Rh20  1  0.250  0.004  0.176  1.0
  Rh  Rh21  1  0.750  0.996  0.824  1.0
  Rh  Rh22  1  0.750  0.504  0.324  1.0
  Rh  Rh23  1  0.250  0.496  0.676  1.0
  Rh  Rh24  1  0.250  0.113  0.326  1.0
  Rh  Rh25  1  0.750  0.887  0.674  1.0
  Rh  Rh26  1  0.750  0.613  0.174  1.0
  Rh  Rh27  1  0.250  0.387  0.826  1.0
[/CIF]
.
The structure described by Rh3Si4 crystallizes in the orthorhombic Pnma space group. There are three inequivalent Rh sites. In the first Rh site, Rh(1) is bonded in a 7-coordinate geometry to one Si(1), three equivalent Si(3), and three equivalent Si(4) atoms. In the second Rh site, Rh(2) is bonded in a 6-coordinate geometry to one Si(1), two equivalent Si(3), and three equivalent Si(2) atoms. In the third Rh site, Rh(3) is bonded in a 7-coordinate geometry to one Si(3), one Si(4), two equivalent Si(1), and three equivalent Si(2) atoms. There are four inequivalent Si sites. In the first Si site, Si(1) is bonded in a 4-coordinate geometry to one Rh(1), one Rh(2), and two equivalent Rh(3) atoms. In the second Si site, Si(2) is bonded in a 6-coordinate geometry to three equivalent Rh(2) and three equivalent Rh(3) atoms. In the third Si site, Si(3) is bonded in a 6-coordinate geometry to one Rh(3), two equivalent Rh(2), and three equivalent Rh(1) atoms. In the fourth Si site, Si(4) is bonded to one Rh(3) and three equivalent Rh(1) atoms to form a mixture of distorted edge and corner-sharing SiRh4 tetrahedra. is represented by the CIF file [CIF]
data_Si4Rh3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.622
_cell_length_b   5.828
_cell_length_c   18.832
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   397.571
_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
  Si  Si0  1  0.250  0.387  0.143  1.0
  Si  Si1  1  0.750  0.613  0.857  1.0
  Si  Si2  1  0.750  0.887  0.357  1.0
  Si  Si3  1  0.250  0.113  0.643  1.0
  Si  Si4  1  0.750  0.221  0.232  1.0
  Si  Si5  1  0.250  0.779  0.768  1.0
  Si  Si6  1  0.250  0.721  0.268  1.0
  Si  Si7  1  0.750  0.279  0.732  1.0
  Si  Si8  1  0.250  0.429  0.410  1.0
  Si  Si9  1  0.750  0.571  0.590  1.0
  Si  Si10  1  0.750  0.929  0.090  1.0
  Si  Si11  1  0.250  0.071  0.910  1.0
  Si  Si12  1  0.750  0.480  0.049  1.0
  Si  Si13  1  0.250  0.520  0.951  1.0
  Si  Si14  1  0.250  0.980  0.451  1.0
  Si  Si15  1  0.750  0.020  0.549  1.0
  Rh  Rh16  1  0.250  0.189  0.032  1.0
  Rh  Rh17  1  0.750  0.811  0.968  1.0
  Rh  Rh18  1  0.750  0.689  0.468  1.0
  Rh  Rh19  1  0.250  0.311  0.532  1.0
  Rh  Rh20  1  0.250  0.004  0.176  1.0
  Rh  Rh21  1  0.750  0.996  0.824  1.0
  Rh  Rh22  1  0.750  0.504  0.324  1.0
  Rh  Rh23  1  0.250  0.496  0.676  1.0
  Rh  Rh24  1  0.250  0.113  0.326  1.0
  Rh  Rh25  1  0.750  0.887  0.674  1.0
  Rh  Rh26  1  0.750  0.613  0.174  1.0
  Rh  Rh27  1  0.250  0.387  0.826  1.0
[/CIF]
.