Table 3. O 1s BE, FWHM, and % Relative Area for the Different Oxygen (BO—Bridging Oxygen; NBO—Nonbridging Oxygen) Components in the Various Glasses, as Estimated from Decomposing the XPS Spectra (Figure 4).

glass	component	O 1s XPS
		BE (eV)	fwhm (eV)	% area
Ba	BO	533.1	2.0	16.4
	NBO	531.1	1.8	83.6
Nd	BO	532.5	1.6	12.7
	NBO	530.6	1.6	87.3
Gd	BO	533.0	1.7	13.4
	NBO	531.1	1.7	86.6
Yb	BO	533.0	1.9	22.2
	NBO	531.2	1.7	77.8