YPr crystallizes in the hexagonal P-6m2 space group. Pr(1) is bonded to six equivalent Pr(1) and six equivalent Y(1) atoms to form PrPr6Y6 cuboctahedra that share corners with eighteen equivalent Pr(1)Pr6Y6 cuboctahedra, edges with six equivalent Pr(1)Pr6Y6 cuboctahedra, edges with twelve equivalent Y(1)Pr6Y6 cuboctahedra, faces with eight equivalent Pr(1)Pr6Y6 cuboctahedra, and faces with twelve equivalent Y(1)Pr6Y6 cuboctahedra. Y(1) is bonded to six equivalent Pr(1) and six equivalent Y(1) atoms to form YPr6Y6 cuboctahedra that share corners with eighteen equivalent Y(1)Pr6Y6 cuboctahedra, edges with six equivalent Y(1)Pr6Y6 cuboctahedra, edges with twelve equivalent Pr(1)Pr6Y6 cuboctahedra, faces with eight equivalent Y(1)Pr6Y6 cuboctahedra, and faces with twelve equivalent Pr(1)Pr6Y6 cuboctahedra.
YPr crystallizes in the hexagonal P-6m2 space group. Pr(1) is bonded to six equivalent Pr(1) and six equivalent Y(1) atoms to form PrPr6Y6 cuboctahedra that share corners with eighteen equivalent Pr(1)Pr6Y6 cuboctahedra, edges with six equivalent Pr(1)Pr6Y6 cuboctahedra, edges with twelve equivalent Y(1)Pr6Y6 cuboctahedra, faces with eight equivalent Pr(1)Pr6Y6 cuboctahedra, and faces with twelve equivalent Y(1)Pr6Y6 cuboctahedra. All Pr(1)-Pr(1) bond lengths are 3.71 Å. All Pr(1)-Y(1) bond lengths are 3.66 Å. Y(1) is bonded to six equivalent Pr(1) and six equivalent Y(1) atoms to form YPr6Y6 cuboctahedra that share corners with eighteen equivalent Y(1)Pr6Y6 cuboctahedra, edges with six equivalent Y(1)Pr6Y6 cuboctahedra, edges with twelve equivalent Pr(1)Pr6Y6 cuboctahedra, faces with eight equivalent Y(1)Pr6Y6 cuboctahedra, and faces with twelve equivalent Pr(1)Pr6Y6 cuboctahedra. All Y(1)-Y(1) bond lengths are 3.71 Å.