The intercalation of octadecyltrimethylammonium ion into group IV phosphates alpha- and gamma -zirconium and gamma -titanium has been investigated. These host matrices exchange cationic surfactant to give organo-inorganic composite materials. The obtained materials have an interlayer distance d notably increased with respect to the precursors, and are stable up to 200 degreesC. These intercalated materials can, in turn, exchange transition metal ions, as Pd (Ii) and Rh (III) to give composite materials that can be used in heterogeneous catalysis. After metal exchange, partial surfactant elution does not remarkably modify the XRPD. The IR spectra confirm insertion of metals: competition of the metal with the amine for the P-OH bonding is evident.