1. SPECIFIC SURFACE AREA OF HEAT TREATED ILLITIC MINERAL CLAY. Authors: A. VULPOI, C. IONESCU, VIORICA SIMON.2. STRUCTURAL CHANGES INDUCED IN MINERAL CLAYS BY HIGH TEMPERATURE HEAT TREATMENTS. Authors: M. TĂMĂŞAN, H. MOCUŢA, C. IONESCU, VIORICA SIMON.3. EPR SPECTROSCOPY APPLIED TO THE STUDY OF ANCIENT CERAMICS: PRELIMINARY RESULTS FOR BRONZE AGE POTTERY FROM ILISUA. Authors: C. IONESCU.4. EFFECT OF THE TEMPERATURE AND THE HEATING TIME ON THE COMPOSITION OF AN ILLITE-RICH CLAY: AN XRPD STUDY. Authors: C. IONESCU.