Mn10CuGe5 crystallizes in the tetragonal I422 space group. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a 4-coordinate geometry to four equivalent Ge(1) atoms. In the second Mn site, Mn(2) is bonded in a 6-coordinate geometry to one Cu(1), one Ge(2), and four equivalent Ge(1) atoms. Cu(1) is bonded in a distorted q6 geometry to eight equivalent Mn(2) and two equivalent Ge(2) atoms. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 10-coordinate geometry to two equivalent Mn(1) and eight equivalent Mn(2) atoms. In the second Ge site, Ge(2) is bonded in a distorted q6 geometry to eight equivalent Mn(2) and two equivalent Cu(1) atoms.
Mn10CuGe5 crystallizes in the tetragonal I422 space group. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a 4-coordinate geometry to four equivalent Ge(1) atoms. All Mn(1)-Ge(1) bond lengths are 2.46 Å. In the second Mn site, Mn(2) is bonded in a 6-coordinate geometry to one Cu(1), one Ge(2), and four equivalent Ge(1) atoms. The Mn(2)-Cu(1) bond length is 2.55 Å. The Mn(2)-Ge(2) bond length is 2.54 Å. There are a spread of Mn(2)-Ge(1) bond distances ranging from 2.49-2.76 Å. Cu(1) is bonded in a distorted q6 geometry to eight equivalent Mn(2) and two equivalent Ge(2) atoms. Both Cu(1)-Ge(2) bond lengths are 2.41 Å. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 10-coordinate geometry to two equivalent Mn(1) and eight equivalent Mn(2) atoms. In the second Ge site, Ge(2) is bonded in a distorted q6 geometry to eight equivalent Mn(2) and two equivalent Cu(1) atoms.