Pr3Cu is Uranium Silicide-like 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 Cu(1) atoms to form distorted PrPr8Cu4 cuboctahedra that share corners with twelve equivalent Pr(1)Pr8Cu4 cuboctahedra, edges with eight equivalent Pr(1)Pr8Cu4 cuboctahedra, edges with eight equivalent Cu(1)Pr12 cuboctahedra, faces with four equivalent Cu(1)Pr12 cuboctahedra, and faces with ten equivalent Pr(1)Pr8Cu4 cuboctahedra. In the second Pr site, Pr(2) is bonded in a distorted square co-planar geometry to eight equivalent Pr(1) and four equivalent Cu(1) atoms. Cu(1) is bonded to four equivalent Pr(2) and eight equivalent Pr(1) atoms to form CuPr12 cuboctahedra that share corners with four equivalent Cu(1)Pr12 cuboctahedra, edges with eight equivalent Cu(1)Pr12 cuboctahedra, edges with sixteen equivalent Pr(1)Pr8Cu4 cuboctahedra, faces with four equivalent Cu(1)Pr12 cuboctahedra, and faces with eight equivalent Pr(1)Pr8Cu4 cuboctahedra.
Pr3Cu is Uranium Silicide-like 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 Cu(1) atoms to form distorted PrPr8Cu4 cuboctahedra that share corners with twelve equivalent Pr(1)Pr8Cu4 cuboctahedra, edges with eight equivalent Pr(1)Pr8Cu4 cuboctahedra, edges with eight equivalent Cu(1)Pr12 cuboctahedra, faces with four equivalent Cu(1)Pr12 cuboctahedra, and faces with ten equivalent Pr(1)Pr8Cu4 cuboctahedra. All Pr(1)-Pr(1) bond lengths are 3.34 Å. All Pr(1)-Pr(2) bond lengths are 3.48 Å. All Pr(1)-Cu(1) bond lengths are 3.48 Å. In the second Pr site, Pr(2) is bonded in a distorted square co-planar geometry to eight equivalent Pr(1) and four equivalent Cu(1) atoms. All Pr(2)-Cu(1) bond lengths are 3.34 Å. Cu(1) is bonded to four equivalent Pr(2) and eight equivalent Pr(1) atoms to form CuPr12 cuboctahedra that share corners with four equivalent Cu(1)Pr12 cuboctahedra, edges with eight equivalent Cu(1)Pr12 cuboctahedra, edges with sixteen equivalent Pr(1)Pr8Cu4 cuboctahedra, faces with four equivalent Cu(1)Pr12 cuboctahedra, and faces with eight equivalent Pr(1)Pr8Cu4 cuboctahedra.