Np5Ge3 crystallizes in the tetragonal I4/mcm space group. There are two inequivalent Np sites. In the first Np site, Np(1) is bonded in a 6-coordinate geometry to two equivalent Np(1) and four equivalent Ge(2) atoms. In the second Np site, Np(2) is bonded in a 6-coordinate geometry to two equivalent Ge(1) and four equivalent Ge(2) atoms. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a distorted q6 geometry to eight equivalent Np(2) and two equivalent Ge(1) atoms. In the second Ge site, Ge(2) is bonded in a distorted q6 geometry to two equivalent Np(1) and eight equivalent Np(2) atoms.
Np5Ge3 crystallizes in the tetragonal I4/mcm space group. There are two inequivalent Np sites. In the first Np site, Np(1) is bonded in a 6-coordinate geometry to two equivalent Np(1) and four equivalent Ge(2) atoms. Both Np(1)-Np(1) bond lengths are 2.54 Å. All Np(1)-Ge(2) bond lengths are 2.96 Å. In the second Np site, Np(2) is bonded in a 6-coordinate geometry to two equivalent Ge(1) and four equivalent Ge(2) atoms. Both Np(2)-Ge(1) bond lengths are 3.05 Å. There are a spread of Np(2)-Ge(2) bond distances ranging from 2.83-2.92 Å. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a distorted q6 geometry to eight equivalent Np(2) and two equivalent Ge(1) atoms. Both Ge(1)-Ge(1) bond lengths are 2.54 Å. In the second Ge site, Ge(2) is bonded in a distorted q6 geometry to two equivalent Np(1) and eight equivalent Np(2) atoms.