Table 2.

Surface concentration of elements in a new sample (etalon), a sample with crack defects, and a sample with bulge defects (wt.%).

Spectrum	B	Na	Mg	Al	Si	K	Ca	Ti	Fe
Etalon	7.43	0.96	3.26	4.21	9.72	0.09	6.43	0.35	2.45
Cracks	4.22	1.50	4.60	5.96	12.08	0.89	14.11	1.04	2.78
Bulges	4.16	0.92	3.90	5.03	10.24	0.57	10.33	0.77	1.94