Co2Ge is Cotunnite structured and crystallizes in the orthorhombic Pnma space group. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a 13-coordinate geometry to two equivalent Co(1), six equivalent Co(2), and five equivalent Ge(1) atoms. In the second Co site, Co(2) is bonded in a 13-coordinate geometry to two equivalent Co(2), six equivalent Co(1), and five equivalent Ge(1) atoms. Ge(1) is bonded in a 10-coordinate geometry to five equivalent Co(1) and five equivalent Co(2) atoms.
Co2Ge is Cotunnite structured and crystallizes in the orthorhombic Pnma space group. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a 13-coordinate geometry to two equivalent Co(1), six equivalent Co(2), and five equivalent Ge(1) atoms. Both Co(1)-Co(1) bond lengths are 2.73 Å. There are a spread of Co(1)-Co(2) bond distances ranging from 2.52-2.73 Å. There are a spread of Co(1)-Ge(1) bond distances ranging from 2.33-2.66 Å. In the second Co site, Co(2) is bonded in a 13-coordinate geometry to two equivalent Co(2), six equivalent Co(1), and five equivalent Ge(1) atoms. Both Co(2)-Co(2) bond lengths are 2.52 Å. There are a spread of Co(2)-Ge(1) bond distances ranging from 2.41-2.61 Å. Ge(1) is bonded in a 10-coordinate geometry to five equivalent Co(1) and five equivalent Co(2) atoms.