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Table 4 Average chemical composition of the green glaze by SEM/EDS/WDS [expressed as oxides wt%]

From: Gothic green glazed tile from Malbork Castle: multi-analytical study

Compound Na2O MgO Al2O3 SiO2 P2O5 K2O CaO TiO2 FeO CuO PbO As2O3 SnO2 Sb2O3 ZnO
Average 2.1 1.02 3.0 38.3 0.20 1.8 2.8 0.5 3.3 9.4 37.3 0.21 0.51 0.53 0.04
Stdv. 0.6 0.40 0.9 5.0 0.06 0.8 1.4 0.1 0.8 1.9 5.0 0.20 0.19 0.13 0.02
Method EDS WDS EDS EDS WDS EDS EDS EDS EDS EDS EDS WDS WDS WDS WDS
  1. WDS measurements for As, Mg, P, Sn, Sb and Zn