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Table 4 Chemical compositions of the marked positions in Fig. 5d

From: Corrosion of Longquan celadons in the marine environment: study on the celadons from the Dalian Island shipwreck of the Yuan Dynasty

Position No. Ratio Na2O MgO Al2O3 SiO2 K2O CaO Fe2O3 P2O5 Possible phase
P1 wt% 1.51 2.09 26.91 49.48 1.47 18.53    Anorthite
mol% 1.61 3.46 17.48 54.54 1.03 21.88   
P2 wt% 0.90 2.78 12.88 65.02 4.77 12.91 0.36 0.38 Glass
mol% 0.92 4.40 8.00 68.57 3.21 14.58 0.14 0.17