“…The effect of the different parameters on the induction time for gypsum nucleation was determined in the past under variable environmental conditions (Smith and Sweett, 1971;Hileman, 1978a,b, 1980;Liu and Nancollas, 1973;Packter, 1974;Klepetsanis and Koutsoukos, 1991;He et al, 1994;Klepetsanis et al, 1999;Lancia et al, 1999;Linnikov, 1999;Hina et al, 2001;Prisciandaro et al, 2001;Abdel-Aal et al, 2004;Uchymiak et al, 2008). Although a wide range of solution compositions were studied, most can be characterized as exhibiting low ionic strengths and equivalent concentrations of Ca 2+ and SO 2À 4 .…”