Low-Temperature Transformations of Protonic Forms of Layered Complex Oxides HLnTiO₄ and H₂Ln₂Ti₃O₁₀ (Ln = La, Nd)

Figure 1

X-ray powder patterns: (a) precursor NaLaTiO₄; (b) HLaTiO₄; (c) precursor NaNdTiO₄; (d) HNdTiO₄.

(a)

(b)