FT-IR STUDY OF THE OH SURFACE GROUPS ON CORDIERITE AEROGEL M.-I. BARATON, T. MERLE-MEJEAN, P. QUINTARD et V. LORENZELLI J. Phys. Colloques, 50 C4 (1989) C4-239-C4-243 DOI: 10.1051/jphyscol:1989439