XAFS, IR, Raman and UV-Vis Characterization of Framework Ti(IV) Species in Ti-Silicalites C. Lamberti, S. Bordiga, A. Zecchina, G. Vlaic, G. Tozzola, G. Petrini et A. Carati J. Phys. IV France, 7 C2 (1997) C2-851-C2-853 DOI: 10.1051/jp4:1997257