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Table 3 The chemical composition of the ceramic body by SEM/EDS [expressed as oxides wt%, normalized to 100%] (an average of the three measurements—an area analysis)

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

Compound Na2O MgO Al2O3 SiO2 P2O5 K2O CaO TiO2 FeO PbO
Feldspar 1.0 nd 16.3 64.4 0.3 13.5 nd nd 0.4 1.9
Ceramic body mass 2.1 2.1 18.6 55.3 nd 5.6 1.5 0.8 5.7 nd
Quartz nd nd 1.0 99.6 nd nd nd nd nd nd
  1. nd not determined