Crystal structure of κ-In2Se3

Structural properties of single-phase films of κ-In2Se3 and γ-In2Se3 were investigated. Both films were polycrystalline but their microstructures differed considerably. The a-lattice parameter of κ-In2Se3 has been measured. A comparison between these two materials indicates that κ-In2Se3 has a significantly larger unit cell (Δc=2.5±0.2% and Δa=13.5±0.5%) and a structure more similar to the α-phase of In2Se3.