THE RAMAN SPECTRUM-OF HEMATITE: POSSIBLE INDICATOR FOR A COMPOSITIONAL OR FIRING DISTINCTION AMONG TERRA S1GILLATA WARES

摘要

The Raman spectrum of hematite (alpha-Fe_2O_3) is here discussed as a distinctive feature for Term Sigillata sample wares.The broadening of the Raman lines and the appearance and increasing of the disorder band at 660 cm~(-1),while moving from the external slip to the inner body,are proposed as valuation parameters for the study of the mineralogical composition and firing process of pottery productions.