Table 5. Skeletal Densities and Pore Fractions for Aerogels^a.

sample	skeletal density (g·cm–3)	pore fraction
CJ2.3.E-61	2.19 ± 0.02	0.81 ± 0.08
CJ2.7.B-15	2.16 ± 0.04	0.78 ± 0.08
CJ2.9.B-30	2.8 ± 0.1	0.83 ± 0.08
CJ3.3.B-15	2.32 ± 0.05	0.76 ± 0.08
CJ3.7.A-17	2.31 ± 0.05	0.86 ± 0.09
CJ3.9.A-15	2.86 ± 0.20	0.86 ± 0.09
ISG.3.B-15	1.86 ± 0.02	0.81 ± 0.08
ISG.7.A-60	2.49 ± 0.08	0.83 ± 0.08
ISG.9.B-45	2.16 ± 0.03	0.79 ± 0.08

^aErrors are given as two standard deviations after multiple analyzes.