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CeAu3 crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Ce3+ is bonded to twelve equivalent Au1- atoms to form a mixture of corner and face-sharing CeAu12 cuboctahedra. There are six shorter (3.11 Å) and six longer (3.24 Å) Ce–Au bond lengths. Au1- is bonded in a 4-coordinate geometry to four equivalent Ce3+ atoms.
CeAu crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. Ce is bonded in a 7-coordinate geometry to seven equivalent Au atoms. There are a spread of Ce–Au bond distances ranging from 3.12–3.23 Å. Au is bonded in a 7-coordinate geometry to seven equivalent Ce atoms.
CeAu crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Ce is bonded in a 7-coordinate geometry to seven equivalent Au atoms. There are a spread of Ce–Au bond distances ranging from 3.13–3.23 Å. Au is bonded in a 7-coordinate geometry to seven equivalent Ce atoms.