The structure described by RhSi2P3O13 crystallizes in the trigonal P321 space group. Rh(1) is bonded to three equivalent O(3) and three equivalent O(4) atoms to form RhO6 octahedra that share corners with three equivalent P(1)O4 tetrahedra and corners with three equivalent P(2)O4 tetrahedra. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(5) and three equivalent O(1) atoms to form SiO4 tetrahedra that share  a cornercorner with one Si(2)O4 tetrahedra and corners with three equivalent P(1)O4 tetrahedra. In the second Si site, Si(2) is bonded to one O(5) and three equivalent O(2) atoms to form SiO4 tetrahedra that share  a cornercorner with one Si(1)O4 tetrahedra and corners with three equivalent P(2)O4 tetrahedra. There are two inequivalent P sites. In the first P site, P(1) is bonded to two equivalent O(1) and two equivalent O(3) atoms to form PO4 tetrahedra that share corners with two equivalent Rh(1)O6 octahedra and corners with two equivalent Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 51°. In the second P site, P(2) is bonded to two equivalent O(2) and two equivalent O(4) atoms to form PO4 tetrahedra that share corners with two equivalent Rh(1)O6 octahedra and corners with two equivalent Si(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 52°. There are five inequivalent O sites. In the first O site, O(5) is bonded in a linear geometry to one Si(1) and one Si(2) atom. In the second O site, O(1) is bonded in a bent 120 degrees geometry to one Si(1) and one P(1) atom. In the third O site, O(2) is bonded in a linear geometry to one Si(2) and one P(2) atom. In the fourth O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Rh(1) and one P(1) atom. In the fifth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Rh(1) and one P(2) atom. is represented by the CIF card [CIF]
data_Si2P3RhO13
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.221
_cell_length_b   8.221
_cell_length_c   8.842
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   517.499
_cell_formula_units_Z   2
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  0.333  0.667  0.503  1.0
  Si  Si1  1  0.667  0.333  0.497  1.0
  Si  Si2  1  0.333  0.667  0.868  1.0
  Si  Si3  1  0.667  0.333  0.132  1.0
  P  P4  1  0.283  0.000  0.500  1.0
  P  P5  1  0.717  0.717  0.500  1.0
  P  P6  1  0.000  0.283  0.500  1.0
  P  P7  1  0.286  0.286  0.000  1.0
  P  P8  1  0.000  0.714  0.000  1.0
  P  P9  1  0.714  0.000  0.000  1.0
  Rh  Rh10  1  0.000  0.000  0.752  1.0
  Rh  Rh11  1  0.000  0.000  0.248  1.0
  O  O12  1  0.328  0.848  0.431  1.0
  O  O13  1  0.520  0.672  0.431  1.0
  O  O14  1  0.152  0.480  0.431  1.0
  O  O15  1  0.331  0.480  0.930  1.0
  O  O16  1  0.149  0.669  0.930  1.0
  O  O17  1  0.520  0.851  0.930  1.0
  O  O18  1  0.669  0.149  0.070  1.0
  O  O19  1  0.480  0.331  0.070  1.0
  O  O20  1  0.851  0.520  0.070  1.0
  O  O21  1  0.672  0.520  0.569  1.0
  O  O22  1  0.848  0.328  0.569  1.0
  O  O23  1  0.480  0.152  0.569  1.0
  O  O24  1  0.142  0.902  0.626  1.0
  O  O25  1  0.759  0.858  0.626  1.0
  O  O26  1  0.098  0.241  0.626  1.0
  O  O27  1  0.142  0.242  0.124  1.0
  O  O28  1  0.100  0.858  0.124  1.0
  O  O29  1  0.758  0.900  0.124  1.0
  O  O30  1  0.858  0.100  0.876  1.0
  O  O31  1  0.242  0.142  0.876  1.0
  O  O32  1  0.900  0.758  0.876  1.0
  O  O33  1  0.858  0.759  0.374  1.0
  O  O34  1  0.902  0.142  0.374  1.0
  O  O35  1  0.241  0.098  0.374  1.0
  O  O36  1  0.333  0.667  0.685  1.0
  O  O37  1  0.667  0.333  0.315  1.0
[/CIF]
.
The structure described by RhSi2P3O13 crystallizes in the trigonal P321 space group. Rh(1) is bonded to three equivalent O(3) and three equivalent O(4) atoms to form RhO6 octahedra that share corners with three equivalent P(1)O4 tetrahedra and corners with three equivalent P(2)O4 tetrahedra. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(5) and three equivalent O(1) atoms to form SiO4 tetrahedra that share  a cornercorner with one Si(2)O4 tetrahedra and corners with three equivalent P(1)O4 tetrahedra. In the second Si site, Si(2) is bonded to one O(5) and three equivalent O(2) atoms to form SiO4 tetrahedra that share  a cornercorner with one Si(1)O4 tetrahedra and corners with three equivalent P(2)O4 tetrahedra. There are two inequivalent P sites. In the first P site, P(1) is bonded to two equivalent O(1) and two equivalent O(3) atoms to form PO4 tetrahedra that share corners with two equivalent Rh(1)O6 octahedra and corners with two equivalent Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 51°. In the second P site, P(2) is bonded to two equivalent O(2) and two equivalent O(4) atoms to form PO4 tetrahedra that share corners with two equivalent Rh(1)O6 octahedra and corners with two equivalent Si(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 52°. There are five inequivalent O sites. In the first O site, O(5) is bonded in a linear geometry to one Si(1) and one Si(2) atom. In the second O site, O(1) is bonded in a bent 120 degrees geometry to one Si(1) and one P(1) atom. In the third O site, O(2) is bonded in a linear geometry to one Si(2) and one P(2) atom. In the fourth O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Rh(1) and one P(1) atom. In the fifth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Rh(1) and one P(2) atom. is represented by the CIF card [CIF]
data_Si2P3RhO13
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.221
_cell_length_b   8.221
_cell_length_c   8.842
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   517.499
_cell_formula_units_Z   2
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  0.333  0.667  0.503  1.0
  Si  Si1  1  0.667  0.333  0.497  1.0
  Si  Si2  1  0.333  0.667  0.868  1.0
  Si  Si3  1  0.667  0.333  0.132  1.0
  P  P4  1  0.283  0.000  0.500  1.0
  P  P5  1  0.717  0.717  0.500  1.0
  P  P6  1  0.000  0.283  0.500  1.0
  P  P7  1  0.286  0.286  0.000  1.0
  P  P8  1  0.000  0.714  0.000  1.0
  P  P9  1  0.714  0.000  0.000  1.0
  Rh  Rh10  1  0.000  0.000  0.752  1.0
  Rh  Rh11  1  0.000  0.000  0.248  1.0
  O  O12  1  0.328  0.848  0.431  1.0
  O  O13  1  0.520  0.672  0.431  1.0
  O  O14  1  0.152  0.480  0.431  1.0
  O  O15  1  0.331  0.480  0.930  1.0
  O  O16  1  0.149  0.669  0.930  1.0
  O  O17  1  0.520  0.851  0.930  1.0
  O  O18  1  0.669  0.149  0.070  1.0
  O  O19  1  0.480  0.331  0.070  1.0
  O  O20  1  0.851  0.520  0.070  1.0
  O  O21  1  0.672  0.520  0.569  1.0
  O  O22  1  0.848  0.328  0.569  1.0
  O  O23  1  0.480  0.152  0.569  1.0
  O  O24  1  0.142  0.902  0.626  1.0
  O  O25  1  0.759  0.858  0.626  1.0
  O  O26  1  0.098  0.241  0.626  1.0
  O  O27  1  0.142  0.242  0.124  1.0
  O  O28  1  0.100  0.858  0.124  1.0
  O  O29  1  0.758  0.900  0.124  1.0
  O  O30  1  0.858  0.100  0.876  1.0
  O  O31  1  0.242  0.142  0.876  1.0
  O  O32  1  0.900  0.758  0.876  1.0
  O  O33  1  0.858  0.759  0.374  1.0
  O  O34  1  0.902  0.142  0.374  1.0
  O  O35  1  0.241  0.098  0.374  1.0
  O  O36  1  0.333  0.667  0.685  1.0
  O  O37  1  0.667  0.333  0.315  1.0
[/CIF]
.