TEXTURAL AND STRUCTURAL STUDIES OF AEROGELS BY RAMAN SCATTERING AND THERMOPOROMETRY J.L. ROUSSET, A. BOUKENTER, B. CHAMPAGNON, E. DUVAL, J.F. QUINSON, M. CHATELUT, J. DUMAS et J. SERUGHETTI J. Phys. Colloques, 50 C4 (1989) C4-163-C4-166 DOI: 10.1051/jphyscol:1989426