HfCuGe2 is Parent of FeAs superconductors-derived structured and crystallizes in the tetragonal P4/nmm space group. Hf(1) is bonded to four equivalent Cu(1), four equivalent Ge(1), and four equivalent Ge(2) atoms to form distorted HfCu4Ge8 cuboctahedra that share corners with four equivalent Hf(1)Cu4Ge8 cuboctahedra, edges with eight equivalent Hf(1)Cu4Ge8 cuboctahedra, edges with eight equivalent Cu(1)Hf4Cu4Ge4 cuboctahedra, faces with four equivalent Hf(1)Cu4Ge8 cuboctahedra, and faces with four equivalent Cu(1)Hf4Cu4Ge4 cuboctahedra. Cu(1) is bonded to four equivalent Hf(1), four equivalent Cu(1), and four equivalent Ge(2) atoms to form distorted CuHf4Cu4Ge4 cuboctahedra that share corners with four equivalent Cu(1)Hf4Cu4Ge4 cuboctahedra, edges with eight equivalent Hf(1)Cu4Ge8 cuboctahedra, faces with four equivalent Hf(1)Cu4Ge8 cuboctahedra, and faces with eight equivalent Cu(1)Hf4Cu4Ge4 cuboctahedra. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 8-coordinate geometry to four equivalent Hf(1) and four equivalent Ge(1) atoms. In the second Ge site, Ge(2) is bonded in a 8-coordinate geometry to four equivalent Hf(1) and four equivalent Cu(1) atoms.
HfCuGe2 is Parent of FeAs superconductors-derived structured and crystallizes in the tetragonal P4/nmm space group. Hf(1) is bonded to four equivalent Cu(1), four equivalent Ge(1), and four equivalent Ge(2) atoms to form distorted HfCu4Ge8 cuboctahedra that share corners with four equivalent Hf(1)Cu4Ge8 cuboctahedra, edges with eight equivalent Hf(1)Cu4Ge8 cuboctahedra, edges with eight equivalent Cu(1)Hf4Cu4Ge4 cuboctahedra, faces with four equivalent Hf(1)Cu4Ge8 cuboctahedra, and faces with four equivalent Cu(1)Hf4Cu4Ge4 cuboctahedra. All Hf(1)-Cu(1) bond lengths are 3.04 Å. All Hf(1)-Ge(1) bond lengths are 2.86 Å. All Hf(1)-Ge(2) bond lengths are 2.78 Å. Cu(1) is bonded to four equivalent Hf(1), four equivalent Cu(1), and four equivalent Ge(2) atoms to form distorted CuHf4Cu4Ge4 cuboctahedra that share corners with four equivalent Cu(1)Hf4Cu4Ge4 cuboctahedra, edges with eight equivalent Hf(1)Cu4Ge8 cuboctahedra, faces with four equivalent Hf(1)Cu4Ge8 cuboctahedra, and faces with eight equivalent Cu(1)Hf4Cu4Ge4 cuboctahedra. All Cu(1)-Cu(1) bond lengths are 2.66 Å. All Cu(1)-Ge(2) bond lengths are 2.46 Å. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 8-coordinate geometry to four equivalent Hf(1) and four equivalent Ge(1) atoms. All Ge(1)-Ge(1) bond lengths are 2.66 Å. In the second Ge site, Ge(2) is bonded in a 8-coordinate geometry to four equivalent Hf(1) and four equivalent Cu(1) atoms.