Ge3Cu is Sodium arsenide structured and crystallizes in the hexagonal P6_3/mmc space group. Cu(1) is bonded in a 11-coordinate geometry to three equivalent Ge(2) and eight equivalent Ge(1) atoms. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 10-coordinate geometry to four equivalent Cu(1), three equivalent Ge(1), and three equivalent Ge(2) atoms. In the second Ge site, Ge(2) is bonded in a distorted trigonal planar geometry to three equivalent Cu(1) and six equivalent Ge(1) atoms.
Ge3Cu is Sodium arsenide structured and crystallizes in the hexagonal P6_3/mmc space group. Cu(1) is bonded in a 11-coordinate geometry to three equivalent Ge(2) and eight equivalent Ge(1) atoms. All Cu(1)-Ge(2) bond lengths are 2.51 Å. There are two shorter (2.91 Å) and six longer (2.95 Å) Cu(1)-Ge(1) bond lengths. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 10-coordinate geometry to four equivalent Cu(1), three equivalent Ge(1), and three equivalent Ge(2) atoms. All Ge(1)-Ge(1) bond lengths are 2.85 Å. All Ge(1)-Ge(2) bond lengths are 2.95 Å. In the second Ge site, Ge(2) is bonded in a distorted trigonal planar geometry to three equivalent Cu(1) and six equivalent Ge(1) atoms.