Np(CuGe)2 crystallizes in the tetragonal I4/mmm space group. Np(1) is bonded in a 16-coordinate geometry to eight equivalent Cu(1) and eight equivalent Ge(1) atoms. Cu(1) is bonded to four equivalent Np(1) and four equivalent Ge(1) atoms to form a mixture of distorted face, corner, and edge-sharing CuNp4Ge4 tetrahedra. Ge(1) is bonded in a 9-coordinate geometry to four equivalent Np(1), four equivalent Cu(1), and one Ge(1) atom.
Np(CuGe)2 crystallizes in the tetragonal I4/mmm space group. Np(1) is bonded in a 16-coordinate geometry to eight equivalent Cu(1) and eight equivalent Ge(1) atoms. All Np(1)-Cu(1) bond lengths are 3.29 Å. All Np(1)-Ge(1) bond lengths are 3.08 Å. Cu(1) is bonded to four equivalent Np(1) and four equivalent Ge(1) atoms to form a mixture of distorted face, corner, and edge-sharing CuNp4Ge4 tetrahedra. All Cu(1)-Ge(1) bond lengths are 2.43 Å. Ge(1) is bonded in a 9-coordinate geometry to four equivalent Np(1), four equivalent Cu(1), and one Ge(1) atom. The Ge(1)-Ge(1) bond length is 2.45 Å.