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

Heritage Science

Table 2 Chemical compositions of the marked positions in Fig. 2b and f

Position No.	Ratio	Na₂O	MgO	Al₂O₃	SiO₂	K₂O	CaO	TiO₂	Fe₂O₃	MnO	P₂O₅	Possible phase
P1	wt%		15.45	3.84	51.42		28.49		0.79			Diopside
P1	mol%		21.55	2.10	47.74		28.34		0.28			Diopside
P2	wt%	1.09	0.86	26.12	55.31	2.21	13.49		0.91			Anorthite
P2	mol%	1.18	1.45	17.24	61.97	1.58	16.19		0.38			Anorthite
P3	wt%	0.42	0.76	7.83	33.93	3.56	30.31		1.73	0.70	20.76	Calcium phosphate
P3	mol%	0.48	1.35	5.44	39.98	2.68	38.26		0.77	0.70	10.35	Calcium phosphate
P4	wt%	0.30	5.15	10.83	60.30	5.07	9.23	0.46	5.11	2.25	1.30	Glass
P4	mol%	0.31	8.36	6.89	65.15	3.49	10.68	0.37	2.07	2.06	0.59	Glass