“…It often occurs with calcite, tremolite, diopside, anorthite and a number of other rare calcium-magnesium silicate minerals (Deer et al, 1992). These mineral phases have also been reported to form in glass-ceramics produced by thermally treating mixes of a number of other municipal and industrial wastes including IBA, incinerator fly ash, coal fired power station fly ash, waste fluorescent glass and electric arc furnace dust (Boccaccini et al, 1995(Boccaccini et al, , 1997(Boccaccini et al, , 2000Erol et al, 2000Erol et al, , 2001Gao and Drummond, 1999;Öveçolu et al, 1997;Park and Heo, 2002;Rincón et al, 1999;Romero et al, 1999;Yun et al, 2002).…”