Observation of intermediate phases during the lithium intercalation of TiX2 (X = S, Se)

Abstract Three-fold superlattice structures are observed at the composition Li 0.33 TiX 2 during the lithium intercalation of TiX 2 (X = S,Se). A model with a tripled c -axis is proposed for these complexes, and provides a satisfactory match between observed and calculated intensities on X-ray powder diffraction patterns.