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The ancient bricks of the monastery of Fragala in Frazzano, the first Basilian-Norman center in Sicily and symbol of 15 centuries of cultural life, were studied and characterized by a combination of techniques (INAA, ICP, porosimetry, HPLC, TG-DTA and XRD). Chemical analysis shows that the Byzantine samples were mainly manufactured by calcareous clay while medieval ones were made of limeless clay...
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