Figure 4From: Petro-archaeometric characterization of potteries from a kiln in Adrano, Sicily Variation diagrams. (a) SiO2 (wt%) vs. CaO (wt%); (b) SiO2 (wt%) vs. TiO2 (wt%); (c) SiO2 (wt%) vs. Fe2O3 (wt%); (d) Cr (ppm) vs. Ni (ppm).Back to article page