Table 1 chemical compositions of blue-sky and green-ocean glasses, obtained by SEM analysis
From: Analysing the glaze of a medieval ceramic fragment from the Durres Amphitheater in Albania
Oxides (wt.%) | Blue-sky glasses | Green-ocean glasses |
|---|---|---|
SiO2 | 52.0 | 54.6 |
Al2O3 | 4.70 | 4.20 |
FeOt | 1.50 | 0.60 |
MgO | 1.20 | 0.80 |
CaO | 1.30 | 1.40 |
Na2O | 3.00 | 3.60 |
K2O | 6.20 | 5.30 |
P2O5 | 2.70 | 2.70 |
PbO | 24.1 | 25.0 |
As2O3 | 0.90 | 0.70 |
CoO | 0.50 | bdl |