Li5(CuGe)2 crystallizes in the trigonal P-3m1 space group. There are three inequivalent Li sites. In the first Li site, Li(1) is bonded in a 11-coordinate geometry to one Li(2), three equivalent Li(3), three equivalent Cu(1), and four equivalent Ge(1) atoms. In the second Li site, Li(2) is bonded in a 4-coordinate geometry to one Li(1), three equivalent Cu(1), and four equivalent Ge(1) atoms. In the third Li site, Li(3) is bonded in a distorted linear geometry to six equivalent Li(1) and two equivalent Cu(1) atoms. Cu(1) is bonded in a 7-coordinate geometry to one Li(3), three equivalent Li(1), three equivalent Li(2), and three equivalent Ge(1) atoms. Ge(1) is bonded in a 11-coordinate geometry to four equivalent Li(1), four equivalent Li(2), and three equivalent Cu(1) atoms.
Li5(CuGe)2 crystallizes in the trigonal P-3m1 space group. There are three inequivalent Li sites. In the first Li site, Li(1) is bonded in a 11-coordinate geometry to one Li(2), three equivalent Li(3), three equivalent Cu(1), and four equivalent Ge(1) atoms. The Li(1)-Li(2) bond length is 2.53 Å. All Li(1)-Li(3) bond lengths are 2.58 Å. All Li(1)-Cu(1) bond lengths are 2.86 Å. There are three shorter (2.62 Å) and one longer (2.85 Å) Li(1)-Ge(1) bond length. In the second Li site, Li(2) is bonded in a 4-coordinate geometry to one Li(1), three equivalent Cu(1), and four equivalent Ge(1) atoms. All Li(2)-Cu(1) bond lengths are 2.61 Å. There is one shorter (2.61 Å) and three longer (2.85 Å) Li(2)-Ge(1) bond lengths. In the third Li site, Li(3) is bonded in a distorted linear geometry to six equivalent Li(1) and two equivalent Cu(1) atoms. Both Li(3)-Cu(1) bond lengths are 2.45 Å. Cu(1) is bonded in a 7-coordinate geometry to one Li(3), three equivalent Li(1), three equivalent Li(2), and three equivalent Ge(1) atoms. All Cu(1)-Ge(1) bond lengths are 2.47 Å. Ge(1) is bonded in a 11-coordinate geometry to four equivalent Li(1), four equivalent Li(2), and three equivalent Cu(1) atoms.