TABLE 3.

Calculated parameters (activation areas and volumes) from the analysis of the $v-K$ and $v-G$ curves for the different glasses. The data presented are average values. The regression coefficient for the fittings is always larger than 0.9.

		$v-K$ based analysis			$v-G$ based analysis
Equation		v = CKm		$v=v_{\text{o}}{e}^{\hspace{0.17em}\frac{-\Delta E+b{K}_I}{RT}}\to \Delta V^{\ast }=\frac{b}{2}\sqrt{\pi \rho }$	$v\approx v_o{e}^{\frac{-\Delta E+A\ast G}{RT}}$
Glass	n	C (MPa-mm1-m/2s-1)	m	Activation Volume, ΔV* (Å3)	Activation area, A* (Å2)
6P44a	2	30.1	17	2.6 ± 0.2	0.9 ± 0.2
6P50	1	12.2	17	3.4	1.4
6P53a	1	50.8	21	3.7	1.3
6P53c	1	30.2	19	3.8	1.6
6P55	2	2.3	17	3.2 ± 0.4	1.2 ± 0.2
6P57	5	10.9	19	3.4 ± 0.4	1.2 ± 0.2
6P61	3	30.5	20	3.7 ± 0.9	1.4 ± 0.4
SiO2	2	9.6 104	32	5.6 ± 0.9	1.9 ± 0.2