Citation: Rutt, O.J.; Hill, T.L.; Gal, Z.A.; Hayward, M.A.; Clarke, S.J. (2003). The cation-deficient Ruddlesden-Popper oxysulfide Y2 Ti2 O5 S2 as a layered sulfide: topotactic potassium intercalation to form K Y2 Ti2 O5 S2. Inorganic Chemistry, 42, pp. 7906-7911.