The structure described by YPr is beta-derived structured and crystallizes in the trigonal R3m space group. There are four inequivalent Pr sites. In the first Pr site, Pr(1) is bonded to three equivalent Pr(3), six equivalent Pr(1), and three equivalent Y(3) atoms to form PrPr9Y3 cuboctahedra that share corners with six equivalent Pr(1)Pr9Y3 cuboctahedra, corners with six equivalent Y(1)Pr3Y9 cuboctahedra, corners with six equivalent Y(2)Pr6Y6 cuboctahedra, edges with six equivalent Pr(1)Pr9Y3 cuboctahedra, edges with six equivalent Pr(3)Pr9Y3 cuboctahedra, edges with six equivalent Y(3)Pr3Y9 cuboctahedra,  a faceface with one Y(1)Pr3Y9 cuboctahedra,  a faceface with one Y(2)Pr6Y6 cuboctahedra, faces with six equivalent Pr(1)Pr9Y3 cuboctahedra, faces with six equivalent Pr(3)Pr9Y3 cuboctahedra, and faces with six equivalent Y(3)Pr3Y9 cuboctahedra. In the second Pr site, Pr(2) is bonded to six equivalent Pr(2), three equivalent Y(1), and three equivalent Y(2) atoms to form PrPr6Y6 cuboctahedra that share corners with six equivalent Pr(2)Pr6Y6 cuboctahedra, corners with six equivalent Pr(3)Pr9Y3 cuboctahedra, corners with six equivalent Y(3)Pr3Y9 cuboctahedra, edges with six equivalent Pr(2)Pr6Y6 cuboctahedra, edges with six equivalent Y(1)Pr3Y9 cuboctahedra, edges with six equivalent Y(2)Pr6Y6 cuboctahedra,  a faceface with one Pr(3)Pr9Y3 cuboctahedra,  a faceface with one Y(3)Pr3Y9 cuboctahedra, faces with six equivalent Pr(2)Pr6Y6 cuboctahedra, faces with six equivalent Y(1)Pr3Y9 cuboctahedra, and faces with six equivalent Y(2)Pr6Y6 cuboctahedra. In the third Pr site, Pr(3) is bonded to three equivalent Pr(1), six equivalent Pr(3), and three equivalent Y(2) atoms to form PrPr9Y3 cuboctahedra that share corners with three equivalent Y(3)Pr3Y9 cuboctahedra, corners with six equivalent Pr(2)Pr6Y6 cuboctahedra, corners with six equivalent Pr(3)Pr9Y3 cuboctahedra, edges with three equivalent Y(3)Pr3Y9 cuboctahedra, edges with six equivalent Pr(1)Pr9Y3 cuboctahedra, edges with six equivalent Pr(3)Pr9Y3 cuboctahedra, edges with six equivalent Y(2)Pr6Y6 cuboctahedra,  a faceface with one Pr(2)Pr6Y6 cuboctahedra, faces with six equivalent Pr(1)Pr9Y3 cuboctahedra, faces with six equivalent Pr(3)Pr9Y3 cuboctahedra, and faces with six equivalent Y(2)Pr6Y6 cuboctahedra. In the fourth Pr site, Pr(2) is bonded to six equivalent Pr(2), three equivalent Y(1), and three equivalent Y(2) atoms to form PrPr6Y6 cuboctahedra that share corners with six equivalent Pr(2)Pr6Y6 cuboctahedra, corners with six equivalent Pr(3)Pr9Y3 cuboctahedra, corners with six equivalent Y(3)Pr3Y9 cuboctahedra, edges with six equivalent Pr(2)Pr6Y6 cuboctahedra, edges with six equivalent Y(1)Pr3Y9 cuboctahedra, edges with six equivalent Y(2)Pr6Y6 cuboctahedra,  a faceface with one Pr(3)Pr9Y3 cuboctahedra,  a faceface with one Y(3)Pr3Y9 cuboctahedra, faces with six equivalent Pr(2)Pr6Y6 cuboctahedra, faces with six equivalent Y(1)Pr3Y9 cuboctahedra, and faces with six equivalent Y(2)Pr6Y6 cuboctahedra. There are four inequivalent Y sites. In the first Y site, Y(1) is bonded to three equivalent Pr(2), three equivalent Y(3), and six equivalent Y(1) atoms to form YPr3Y9 cuboctahedra that share corners with three equivalent Y(2)Pr6Y6 cuboctahedra, corners with six equivalent Pr(1)Pr9Y3 cuboctahedra, corners with six equivalent Y(1)Pr3Y9 cuboctahedra, edges with three equivalent Y(2)Pr6Y6 cuboctahedra, edges with six equivalent Pr(2)Pr6Y6 cuboctahedra, edges with six equivalent Y(1)Pr3Y9 cuboctahedra, edges with six equivalent Y(3)Pr3Y9 cuboctahedra,  a faceface with one Pr(1)Pr9Y3 cuboctahedra, faces with six equivalent Pr(2)Pr6Y6 cuboctahedra, faces with six equivalent Y(1)Pr3Y9 cuboctahedra, and faces with six equivalent Y(3)Pr3Y9 cuboctahedra. In the second Y site, Y(2) is bonded to three equivalent Pr(2), three equivalent Pr(3), and six equivalent Y(2) atoms to form YPr6Y6 cuboctahedra that share corners with three equivalent Y(1)Pr3Y9 cuboctahedra, corners with six equivalent Pr(1)Pr9Y3 cuboctahedra, corners with six equivalent Y(2)Pr6Y6 cuboctahedra, edges with three equivalent Y(1)Pr3Y9 cuboctahedra, edges with six equivalent Pr(2)Pr6Y6 cuboctahedra, edges with six equivalent Pr(3)Pr9Y3 cuboctahedra, edges with six equivalent Y(2)Pr6Y6 cuboctahedra,  a faceface with one Pr(1)Pr9Y3 cuboctahedra, faces with six equivalent Pr(2)Pr6Y6 cuboctahedra, faces with six equivalent Pr(3)Pr9Y3 cuboctahedra, and faces with six equivalent Y(2)Pr6Y6 cuboctahedra. In the third Y site, Y(3) is bonded to three equivalent Pr(1), three equivalent Y(1), and six equivalent Y(3) atoms to form YPr3Y9 cuboctahedra that share corners with three equivalent Pr(3)Pr9Y3 cuboctahedra, corners with six equivalent Pr(2)Pr6Y6 cuboctahedra, corners with six equivalent Y(3)Pr3Y9 cuboctahedra, edges with three equivalent Pr(3)Pr9Y3 cuboctahedra, edges with six equivalent Pr(1)Pr9Y3 cuboctahedra, edges with six equivalent Y(1)Pr3Y9 cuboctahedra, edges with six equivalent Y(3)Pr3Y9 cuboctahedra,  a faceface with one Pr(2)Pr6Y6 cuboctahedra, faces with six equivalent Pr(1)Pr9Y3 cuboctahedra, faces with six equivalent Y(1)Pr3Y9 cuboctahedra, and faces with six equivalent Y(3)Pr3Y9 cuboctahedra. In the fourth Y site, Y(2) is bonded to three equivalent Pr(2), three equivalent Pr(3), and six equivalent Y(2) atoms to form YPr6Y6 cuboctahedra that share corners with three equivalent Y(1)Pr3Y9 cuboctahedra, corners with six equivalent Pr(1)Pr9Y3 cuboctahedra, corners with six equivalent Y(2)Pr6Y6 cuboctahedra, edges with three equivalent Y(1)Pr3Y9 cuboctahedra, edges with six equivalent Pr(2)Pr6Y6 cuboctahedra, edges with six equivalent Pr(3)Pr9Y3 cuboctahedra, edges with six equivalent Y(2)Pr6Y6 cuboctahedra,  a faceface with one Pr(1)Pr9Y3 cuboctahedra, faces with six equivalent Pr(2)Pr6Y6 cuboctahedra, faces with six equivalent Pr(3)Pr9Y3 cuboctahedra, and faces with six equivalent Y(2)Pr6Y6 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_PrY
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.691
_cell_length_b   3.691
_cell_length_c   17.992
_cell_angle_alpha   84.113
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   210.748
_cell_formula_units_Z   3
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
  Pr  Pr0  1  0.001  0.003  0.996  1.0
  Pr  Pr1  1  0.500  0.999  0.501  1.0
  Pr  Pr2  1  0.610  0.221  0.169  1.0
  Y  Y3  1  0.111  0.221  0.668  1.0
  Y  Y4  1  0.888  0.776  0.336  1.0
  Y  Y5  1  0.390  0.780  0.830  1.0
[/CIF]
.
The structure described by YPr is beta-derived structured and crystallizes in the trigonal R3m space group. There are four inequivalent Pr sites. In the first Pr site, Pr(1) is bonded to three equivalent Pr(3), six equivalent Pr(1), and three equivalent Y(3) atoms to form PrPr9Y3 cuboctahedra that share corners with six equivalent Pr(1)Pr9Y3 cuboctahedra, corners with six equivalent Y(1)Pr3Y9 cuboctahedra, corners with six equivalent Y(2)Pr6Y6 cuboctahedra, edges with six equivalent Pr(1)Pr9Y3 cuboctahedra, edges with six equivalent Pr(3)Pr9Y3 cuboctahedra, edges with six equivalent Y(3)Pr3Y9 cuboctahedra,  a faceface with one Y(1)Pr3Y9 cuboctahedra,  a faceface with one Y(2)Pr6Y6 cuboctahedra, faces with six equivalent Pr(1)Pr9Y3 cuboctahedra, faces with six equivalent Pr(3)Pr9Y3 cuboctahedra, and faces with six equivalent Y(3)Pr3Y9 cuboctahedra. In the second Pr site, Pr(2) is bonded to six equivalent Pr(2), three equivalent Y(1), and three equivalent Y(2) atoms to form PrPr6Y6 cuboctahedra that share corners with six equivalent Pr(2)Pr6Y6 cuboctahedra, corners with six equivalent Pr(3)Pr9Y3 cuboctahedra, corners with six equivalent Y(3)Pr3Y9 cuboctahedra, edges with six equivalent Pr(2)Pr6Y6 cuboctahedra, edges with six equivalent Y(1)Pr3Y9 cuboctahedra, edges with six equivalent Y(2)Pr6Y6 cuboctahedra,  a faceface with one Pr(3)Pr9Y3 cuboctahedra,  a faceface with one Y(3)Pr3Y9 cuboctahedra, faces with six equivalent Pr(2)Pr6Y6 cuboctahedra, faces with six equivalent Y(1)Pr3Y9 cuboctahedra, and faces with six equivalent Y(2)Pr6Y6 cuboctahedra. In the third Pr site, Pr(3) is bonded to three equivalent Pr(1), six equivalent Pr(3), and three equivalent Y(2) atoms to form PrPr9Y3 cuboctahedra that share corners with three equivalent Y(3)Pr3Y9 cuboctahedra, corners with six equivalent Pr(2)Pr6Y6 cuboctahedra, corners with six equivalent Pr(3)Pr9Y3 cuboctahedra, edges with three equivalent Y(3)Pr3Y9 cuboctahedra, edges with six equivalent Pr(1)Pr9Y3 cuboctahedra, edges with six equivalent Pr(3)Pr9Y3 cuboctahedra, edges with six equivalent Y(2)Pr6Y6 cuboctahedra,  a faceface with one Pr(2)Pr6Y6 cuboctahedra, faces with six equivalent Pr(1)Pr9Y3 cuboctahedra, faces with six equivalent Pr(3)Pr9Y3 cuboctahedra, and faces with six equivalent Y(2)Pr6Y6 cuboctahedra. In the fourth Pr site, Pr(2) is bonded to six equivalent Pr(2), three equivalent Y(1), and three equivalent Y(2) atoms to form PrPr6Y6 cuboctahedra that share corners with six equivalent Pr(2)Pr6Y6 cuboctahedra, corners with six equivalent Pr(3)Pr9Y3 cuboctahedra, corners with six equivalent Y(3)Pr3Y9 cuboctahedra, edges with six equivalent Pr(2)Pr6Y6 cuboctahedra, edges with six equivalent Y(1)Pr3Y9 cuboctahedra, edges with six equivalent Y(2)Pr6Y6 cuboctahedra,  a faceface with one Pr(3)Pr9Y3 cuboctahedra,  a faceface with one Y(3)Pr3Y9 cuboctahedra, faces with six equivalent Pr(2)Pr6Y6 cuboctahedra, faces with six equivalent Y(1)Pr3Y9 cuboctahedra, and faces with six equivalent Y(2)Pr6Y6 cuboctahedra. There are four inequivalent Y sites. In the first Y site, Y(1) is bonded to three equivalent Pr(2), three equivalent Y(3), and six equivalent Y(1) atoms to form YPr3Y9 cuboctahedra that share corners with three equivalent Y(2)Pr6Y6 cuboctahedra, corners with six equivalent Pr(1)Pr9Y3 cuboctahedra, corners with six equivalent Y(1)Pr3Y9 cuboctahedra, edges with three equivalent Y(2)Pr6Y6 cuboctahedra, edges with six equivalent Pr(2)Pr6Y6 cuboctahedra, edges with six equivalent Y(1)Pr3Y9 cuboctahedra, edges with six equivalent Y(3)Pr3Y9 cuboctahedra,  a faceface with one Pr(1)Pr9Y3 cuboctahedra, faces with six equivalent Pr(2)Pr6Y6 cuboctahedra, faces with six equivalent Y(1)Pr3Y9 cuboctahedra, and faces with six equivalent Y(3)Pr3Y9 cuboctahedra. In the second Y site, Y(2) is bonded to three equivalent Pr(2), three equivalent Pr(3), and six equivalent Y(2) atoms to form YPr6Y6 cuboctahedra that share corners with three equivalent Y(1)Pr3Y9 cuboctahedra, corners with six equivalent Pr(1)Pr9Y3 cuboctahedra, corners with six equivalent Y(2)Pr6Y6 cuboctahedra, edges with three equivalent Y(1)Pr3Y9 cuboctahedra, edges with six equivalent Pr(2)Pr6Y6 cuboctahedra, edges with six equivalent Pr(3)Pr9Y3 cuboctahedra, edges with six equivalent Y(2)Pr6Y6 cuboctahedra,  a faceface with one Pr(1)Pr9Y3 cuboctahedra, faces with six equivalent Pr(2)Pr6Y6 cuboctahedra, faces with six equivalent Pr(3)Pr9Y3 cuboctahedra, and faces with six equivalent Y(2)Pr6Y6 cuboctahedra. In the third Y site, Y(3) is bonded to three equivalent Pr(1), three equivalent Y(1), and six equivalent Y(3) atoms to form YPr3Y9 cuboctahedra that share corners with three equivalent Pr(3)Pr9Y3 cuboctahedra, corners with six equivalent Pr(2)Pr6Y6 cuboctahedra, corners with six equivalent Y(3)Pr3Y9 cuboctahedra, edges with three equivalent Pr(3)Pr9Y3 cuboctahedra, edges with six equivalent Pr(1)Pr9Y3 cuboctahedra, edges with six equivalent Y(1)Pr3Y9 cuboctahedra, edges with six equivalent Y(3)Pr3Y9 cuboctahedra,  a faceface with one Pr(2)Pr6Y6 cuboctahedra, faces with six equivalent Pr(1)Pr9Y3 cuboctahedra, faces with six equivalent Y(1)Pr3Y9 cuboctahedra, and faces with six equivalent Y(3)Pr3Y9 cuboctahedra. In the fourth Y site, Y(2) is bonded to three equivalent Pr(2), three equivalent Pr(3), and six equivalent Y(2) atoms to form YPr6Y6 cuboctahedra that share corners with three equivalent Y(1)Pr3Y9 cuboctahedra, corners with six equivalent Pr(1)Pr9Y3 cuboctahedra, corners with six equivalent Y(2)Pr6Y6 cuboctahedra, edges with three equivalent Y(1)Pr3Y9 cuboctahedra, edges with six equivalent Pr(2)Pr6Y6 cuboctahedra, edges with six equivalent Pr(3)Pr9Y3 cuboctahedra, edges with six equivalent Y(2)Pr6Y6 cuboctahedra,  a faceface with one Pr(1)Pr9Y3 cuboctahedra, faces with six equivalent Pr(2)Pr6Y6 cuboctahedra, faces with six equivalent Pr(3)Pr9Y3 cuboctahedra, and faces with six equivalent Y(2)Pr6Y6 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_PrY
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.691
_cell_length_b   3.691
_cell_length_c   17.992
_cell_angle_alpha   84.113
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   210.748
_cell_formula_units_Z   3
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
  Pr  Pr0  1  0.001  0.003  0.996  1.0
  Pr  Pr1  1  0.500  0.999  0.501  1.0
  Pr  Pr2  1  0.610  0.221  0.169  1.0
  Y  Y3  1  0.111  0.221  0.668  1.0
  Y  Y4  1  0.888  0.776  0.336  1.0
  Y  Y5  1  0.390  0.780  0.830  1.0
[/CIF]
.