Pr3Y is alpha La-derived structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded to four equivalent Pr(1), four equivalent Pr(2), and four equivalent Y(1) atoms to form PrPr8Y4 cuboctahedra that share corners with twelve equivalent Pr(1)Pr8Y4 cuboctahedra, edges with eight equivalent Pr(1)Pr8Y4 cuboctahedra, edges with eight equivalent Pr(2)Pr8Y4 cuboctahedra, edges with eight equivalent Y(1)Pr12 cuboctahedra, faces with four equivalent Pr(2)Pr8Y4 cuboctahedra, faces with four equivalent Y(1)Pr12 cuboctahedra, and faces with ten equivalent Pr(1)Pr8Y4 cuboctahedra. In the second Pr site, Pr(2) is bonded to eight equivalent Pr(1) and four equivalent Y(1) atoms to form PrPr8Y4 cuboctahedra that share corners with four equivalent Pr(2)Pr8Y4 cuboctahedra, corners with eight equivalent Y(1)Pr12 cuboctahedra, edges with eight equivalent Pr(2)Pr8Y4 cuboctahedra, edges with sixteen equivalent Pr(1)Pr8Y4 cuboctahedra, faces with four equivalent Pr(2)Pr8Y4 cuboctahedra, faces with six equivalent Y(1)Pr12 cuboctahedra, and faces with eight equivalent Pr(1)Pr8Y4 cuboctahedra. Y(1) is bonded to four equivalent Pr(2) and eight equivalent Pr(1) atoms to form YPr12 cuboctahedra that share corners with four equivalent Y(1)Pr12 cuboctahedra, corners with eight equivalent Pr(2)Pr8Y4 cuboctahedra, edges with eight equivalent Y(1)Pr12 cuboctahedra, edges with sixteen equivalent Pr(1)Pr8Y4 cuboctahedra, faces with four equivalent Y(1)Pr12 cuboctahedra, faces with six equivalent Pr(2)Pr8Y4 cuboctahedra, and faces with eight equivalent Pr(1)Pr8Y4 cuboctahedra.
Pr3Y is alpha La-derived structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded to four equivalent Pr(1), four equivalent Pr(2), and four equivalent Y(1) atoms to form PrPr8Y4 cuboctahedra that share corners with twelve equivalent Pr(1)Pr8Y4 cuboctahedra, edges with eight equivalent Pr(1)Pr8Y4 cuboctahedra, edges with eight equivalent Pr(2)Pr8Y4 cuboctahedra, edges with eight equivalent Y(1)Pr12 cuboctahedra, faces with four equivalent Pr(2)Pr8Y4 cuboctahedra, faces with four equivalent Y(1)Pr12 cuboctahedra, and faces with ten equivalent Pr(1)Pr8Y4 cuboctahedra. All Pr(1)-Pr(1) bond lengths are 3.71 Å. All Pr(1)-Pr(2) bond lengths are 3.68 Å. All Pr(1)-Y(1) bond lengths are 3.68 Å. In the second Pr site, Pr(2) is bonded to eight equivalent Pr(1) and four equivalent Y(1) atoms to form PrPr8Y4 cuboctahedra that share corners with four equivalent Pr(2)Pr8Y4 cuboctahedra, corners with eight equivalent Y(1)Pr12 cuboctahedra, edges with eight equivalent Pr(2)Pr8Y4 cuboctahedra, edges with sixteen equivalent Pr(1)Pr8Y4 cuboctahedra, faces with four equivalent Pr(2)Pr8Y4 cuboctahedra, faces with six equivalent Y(1)Pr12 cuboctahedra, and faces with eight equivalent Pr(1)Pr8Y4 cuboctahedra. All Pr(2)-Y(1) bond lengths are 3.71 Å. Y(1) is bonded to four equivalent Pr(2) and eight equivalent Pr(1) atoms to form YPr12 cuboctahedra that share corners with four equivalent Y(1)Pr12 cuboctahedra, corners with eight equivalent Pr(2)Pr8Y4 cuboctahedra, edges with eight equivalent Y(1)Pr12 cuboctahedra, edges with sixteen equivalent Pr(1)Pr8Y4 cuboctahedra, faces with four equivalent Y(1)Pr12 cuboctahedra, faces with six equivalent Pr(2)Pr8Y4 cuboctahedra, and faces with eight equivalent Pr(1)Pr8Y4 cuboctahedra.