The crystal structure described by PrY3 is alpha La-derived structured and crystallizes in the tetragonal I4/mmm space group. Pr(1) is bonded to four equivalent Y(2) and eight equivalent Y(1) atoms to form PrY12 cuboctahedra that share corners with four equivalent Pr(1)Y12 cuboctahedra, corners with eight equivalent Y(2)Pr4Y8 cuboctahedra, edges with eight equivalent Pr(1)Y12 cuboctahedra, edges with sixteen equivalent Y(1)Pr4Y8 cuboctahedra, faces with four equivalent Pr(1)Y12 cuboctahedra, faces with six equivalent Y(2)Pr4Y8 cuboctahedra, and faces with eight equivalent Y(1)Pr4Y8 cuboctahedra. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded to four equivalent Pr(1), four equivalent Y(1), and four equivalent Y(2) atoms to form YPr4Y8 cuboctahedra that share corners with twelve equivalent Y(1)Pr4Y8 cuboctahedra, edges with eight equivalent Pr(1)Y12 cuboctahedra, edges with eight equivalent Y(1)Pr4Y8 cuboctahedra, edges with eight equivalent Y(2)Pr4Y8 cuboctahedra, faces with four equivalent Pr(1)Y12 cuboctahedra, faces with four equivalent Y(2)Pr4Y8 cuboctahedra, and faces with ten equivalent Y(1)Pr4Y8 cuboctahedra. In the second Y site, Y(2) is bonded to four equivalent Pr(1) and eight equivalent Y(1) atoms to form YPr4Y8 cuboctahedra that share corners with four equivalent Y(2)Pr4Y8 cuboctahedra, corners with eight equivalent Pr(1)Y12 cuboctahedra, edges with eight equivalent Y(2)Pr4Y8 cuboctahedra, edges with sixteen equivalent Y(1)Pr4Y8 cuboctahedra, faces with four equivalent Y(2)Pr4Y8 cuboctahedra, faces with six equivalent Pr(1)Y12 cuboctahedra, and faces with eight equivalent Y(1)Pr4Y8 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_PrY3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.272
_cell_length_b   6.272
_cell_length_c   6.272
_cell_angle_alpha   131.378
_cell_angle_beta   131.378
_cell_angle_gamma   71.213
_symmetry_Int_Tables_number   1
_cell_volume   135.964
_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
  Pr  Pr0  1  0.000  0.000  0.000  1.0
  Y  Y1  1  0.750  0.250  0.500  1.0
  Y  Y2  1  0.250  0.750  0.500  1.0
  Y  Y3  1  0.500  0.500  0.000  1.0
[/CIF]
.
The crystal structure described by PrY3 is alpha La-derived structured and crystallizes in the tetragonal I4/mmm space group. Pr(1) is bonded to four equivalent Y(2) and eight equivalent Y(1) atoms to form PrY12 cuboctahedra that share corners with four equivalent Pr(1)Y12 cuboctahedra, corners with eight equivalent Y(2)Pr4Y8 cuboctahedra, edges with eight equivalent Pr(1)Y12 cuboctahedra, edges with sixteen equivalent Y(1)Pr4Y8 cuboctahedra, faces with four equivalent Pr(1)Y12 cuboctahedra, faces with six equivalent Y(2)Pr4Y8 cuboctahedra, and faces with eight equivalent Y(1)Pr4Y8 cuboctahedra. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded to four equivalent Pr(1), four equivalent Y(1), and four equivalent Y(2) atoms to form YPr4Y8 cuboctahedra that share corners with twelve equivalent Y(1)Pr4Y8 cuboctahedra, edges with eight equivalent Pr(1)Y12 cuboctahedra, edges with eight equivalent Y(1)Pr4Y8 cuboctahedra, edges with eight equivalent Y(2)Pr4Y8 cuboctahedra, faces with four equivalent Pr(1)Y12 cuboctahedra, faces with four equivalent Y(2)Pr4Y8 cuboctahedra, and faces with ten equivalent Y(1)Pr4Y8 cuboctahedra. In the second Y site, Y(2) is bonded to four equivalent Pr(1) and eight equivalent Y(1) atoms to form YPr4Y8 cuboctahedra that share corners with four equivalent Y(2)Pr4Y8 cuboctahedra, corners with eight equivalent Pr(1)Y12 cuboctahedra, edges with eight equivalent Y(2)Pr4Y8 cuboctahedra, edges with sixteen equivalent Y(1)Pr4Y8 cuboctahedra, faces with four equivalent Y(2)Pr4Y8 cuboctahedra, faces with six equivalent Pr(1)Y12 cuboctahedra, and faces with eight equivalent Y(1)Pr4Y8 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_PrY3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.272
_cell_length_b   6.272
_cell_length_c   6.272
_cell_angle_alpha   131.378
_cell_angle_beta   131.378
_cell_angle_gamma   71.213
_symmetry_Int_Tables_number   1
_cell_volume   135.964
_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
  Pr  Pr0  1  0.000  0.000  0.000  1.0
  Y  Y1  1  0.750  0.250  0.500  1.0
  Y  Y2  1  0.250  0.750  0.500  1.0
  Y  Y3  1  0.500  0.500  0.000  1.0
[/CIF]
.