The structure described by Rb3Y(PO4)2 crystallizes in the trigonal P-3m1 space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 7-coordinate geometry to one O(1) and six equivalent O(2) atoms. In the second Rb site, Rb(2) is bonded to six equivalent O(1) and six equivalent O(2) atoms to form RbO12 cuboctahedra that share edges with six equivalent Rb(2)O12 cuboctahedra, edges with six equivalent P(1)O4 tetrahedra, and faces with two equivalent Y(1)O6 octahedra. Y(1) is bonded to six equivalent O(2) atoms to form YO6 octahedra that share corners with six equivalent P(1)O4 tetrahedra and faces with two equivalent Rb(2)O12 cuboctahedra. P(1) is bonded to one O(1) and three equivalent O(2) atoms to form PO4 tetrahedra that share corners with three equivalent Y(1)O6 octahedra and edges with three equivalent Rb(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles are 15°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Rb(1), three equivalent Rb(2), and one P(1) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one Rb(2), two equivalent Rb(1), one Y(1), and one P(1) atom. is represented by the CIF card [CIF]
data_Rb3Y(PO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.698
_cell_length_b   5.698
_cell_length_c   8.044
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   226.167
_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
  Rb  Rb0  1  0.333  0.667  0.748  1.0
  Rb  Rb1  1  0.667  0.333  0.252  1.0
  Rb  Rb2  1  0.000  0.000  0.000  1.0
  Y  Y3  1  0.000  0.000  0.500  1.0
  P  P4  1  0.333  0.667  0.273  1.0
  P  P5  1  0.667  0.333  0.727  1.0
  O  O6  1  0.333  0.667  0.085  1.0
  O  O7  1  0.667  0.333  0.915  1.0
  O  O8  1  0.186  0.814  0.340  1.0
  O  O9  1  0.814  0.186  0.660  1.0
  O  O10  1  0.186  0.372  0.340  1.0
  O  O11  1  0.814  0.628  0.660  1.0
  O  O12  1  0.628  0.814  0.340  1.0
  O  O13  1  0.372  0.186  0.660  1.0
[/CIF]
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The structure described by Rb3Y(PO4)2 crystallizes in the trigonal P-3m1 space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 7-coordinate geometry to one O(1) and six equivalent O(2) atoms. In the second Rb site, Rb(2) is bonded to six equivalent O(1) and six equivalent O(2) atoms to form RbO12 cuboctahedra that share edges with six equivalent Rb(2)O12 cuboctahedra, edges with six equivalent P(1)O4 tetrahedra, and faces with two equivalent Y(1)O6 octahedra. Y(1) is bonded to six equivalent O(2) atoms to form YO6 octahedra that share corners with six equivalent P(1)O4 tetrahedra and faces with two equivalent Rb(2)O12 cuboctahedra. P(1) is bonded to one O(1) and three equivalent O(2) atoms to form PO4 tetrahedra that share corners with three equivalent Y(1)O6 octahedra and edges with three equivalent Rb(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles are 15°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Rb(1), three equivalent Rb(2), and one P(1) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one Rb(2), two equivalent Rb(1), one Y(1), and one P(1) atom. is represented by the CIF card [CIF]
data_Rb3Y(PO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.698
_cell_length_b   5.698
_cell_length_c   8.044
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   226.167
_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
  Rb  Rb0  1  0.333  0.667  0.748  1.0
  Rb  Rb1  1  0.667  0.333  0.252  1.0
  Rb  Rb2  1  0.000  0.000  0.000  1.0
  Y  Y3  1  0.000  0.000  0.500  1.0
  P  P4  1  0.333  0.667  0.273  1.0
  P  P5  1  0.667  0.333  0.727  1.0
  O  O6  1  0.333  0.667  0.085  1.0
  O  O7  1  0.667  0.333  0.915  1.0
  O  O8  1  0.186  0.814  0.340  1.0
  O  O9  1  0.814  0.186  0.660  1.0
  O  O10  1  0.186  0.372  0.340  1.0
  O  O11  1  0.814  0.628  0.660  1.0
  O  O12  1  0.628  0.814  0.340  1.0
  O  O13  1  0.372  0.186  0.660  1.0
[/CIF]
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