Table 5.

Element analysis of four points in Figure 14.

Point	Oxygen		Aluminum		Silicon		Phosphorus		Calcium		Barium		Ferrum
	wt.%	at.%	wt.%	at.%	wt.%	at.%	wt.%	at.%	wt.%	at.%	wt.%	at.%	wt.%	at.%
1	39.98	61.15	0.82	0.74	12.40	10.80	1.85	1.46	38.29	23.38	1.79	0.32	4.88	2.14
2	33.72	52.49	0.71	0.66	17.20	15.25	1.91	1.54	47.32	29.41	0.98	0.18	1.06	0.47
3	39.12	59.71	0.65	0.59	12.45	10.82	1.95	1.54	43.91	26.76	1.01	0.18	0.91	0.40
4	35.62	55.14	0.65	0.60	15.75	13.89	2.21	1.77	43.85	27.10	1.21	0.22	2.91	1.29