The XRD patterns of the minerals in Fig.1show that al lof them are a mixture of minerals with various degrees of crystallization. All of these pozzolans contain albite as their main mineral phase. Four of them (Shahindej, Sahand, Sirjan, and Rafsanjan) contain both zeolites and clay minerals and three of them, (Sirjan, Rafsanjan, and Taftan contain approximately 30% amorphous materials.