Table 4. Physical Observations of Aerogel Samples.
| sample ID | color | opacity | texture |
|---|---|---|---|
| CJ2.3.B-7,15 | yellow-white | mostly opaque | hard and robust |
| CJ2.3.E-61 | white | moderately clear | stiff and brittle |
| CJ2.7.B-15 | white | mostly opaque | stiff and brittle |
| CJ2.9.A-3,7,15,30 | white | opaque | soft and fragile |
| CJ2.9.B-30 | white | opaque | soft and fragile |
| CJ3.3.B-15 | white | opaque | soft and fragile |
| CJ3.7.A-17 | white | opaque | soft and fragile |
| CJ3.9.A-3,15 | white | opaque | soft and fragile |
| ISG.3.B-7,15 | white | mostly clear | stiff and brittle |
| ISG.7.A-15,60 | white | opaque | soft and fragile |
| ISG.9.B-30,45 | white | opaque | soft and fragile |