Table 4.

The EDS analysis of points in Figure 7.

Point A			Point B			Point C
Elem.	Wt.%	At. %	Elem.	Wt.%	At. %	Elem.	Wt.%	At. %
O	58.81	72.65	O	54.36	69.95	O	36.06	62.82
Mg	0.20	0.16	Al	22.82	17.42	Na	0.82	1.00
Al	23.85	17.47	Si	10.36	7.60	Mg	0.57	0.66
Si	8.26	5.81	P	3.81	2.54	Al	8.64	8.93
P	1.56	1.00	K	0.34	0.18	Si	13.05	12.95
K	0.26	0.13	Ca	2.06	1.06	K	1.17	0.83
Ca	2.89	1.43	Ti	0.67	0.29	Ca	0.65	0.45
Ti	1.96	0.81	Fe	0.68	0.25	Ti	1.58	0.92
Fe	1.12	0.40	La	1.81	0.27	Fe	13.34	6.66
Ce	1.09	0.15	Ce	3.08	0.45	La	6.05	1.21
						Nd	4.69	0.91