CeCuGeH1.0 crystallizes in the trigonal P-3m1 space group. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded to six equivalent Cu(1) and six equivalent Ge(1) atoms to form CeCu6Ge6 cuboctahedra that share corners with six equivalent H(1)Ce3Cu trigonal pyramids and faces with six equivalent Ce(1)Cu6Ge6 cuboctahedra. In the second Ce site, Ce(2) is bonded in a hexagonal planar geometry to six equivalent H(1) atoms. Cu(1) is bonded in a distorted single-bond geometry to three equivalent Ce(1), three equivalent Ge(1), and one H(1) atom. Ge(1) is bonded in a 6-coordinate geometry to three equivalent Ce(1) and three equivalent Cu(1) atoms. H(1) is bonded to three equivalent Ce(2) and one Cu(1) atom to form distorted HCe3Cu trigonal pyramids that share corners with three equivalent Ce(1)Cu6Ge6 cuboctahedra, corners with nine equivalent H(1)Ce3Cu trigonal pyramids, and edges with three equivalent H(1)Ce3Cu trigonal pyramids.
CeCuGeH1.0 crystallizes in the trigonal P-3m1 space group. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded to six equivalent Cu(1) and six equivalent Ge(1) atoms to form CeCu6Ge6 cuboctahedra that share corners with six equivalent H(1)Ce3Cu trigonal pyramids and faces with six equivalent Ce(1)Cu6Ge6 cuboctahedra. All Ce(1)-Cu(1) bond lengths are 3.20 Å. All Ce(1)-Ge(1) bond lengths are 3.00 Å. In the second Ce site, Ce(2) is bonded in a hexagonal planar geometry to six equivalent H(1) atoms. All Ce(2)-H(1) bond lengths are 2.42 Å. Cu(1) is bonded in a distorted single-bond geometry to three equivalent Ce(1), three equivalent Ge(1), and one H(1) atom. All Cu(1)-Ge(1) bond lengths are 2.42 Å. The Cu(1)-H(1) bond length is 1.67 Å. Ge(1) is bonded in a 6-coordinate geometry to three equivalent Ce(1) and three equivalent Cu(1) atoms. H(1) is bonded to three equivalent Ce(2) and one Cu(1) atom to form distorted HCe3Cu trigonal pyramids that share corners with three equivalent Ce(1)Cu6Ge6 cuboctahedra, corners with nine equivalent H(1)Ce3Cu trigonal pyramids, and edges with three equivalent H(1)Ce3Cu trigonal pyramids.