Silica Aerogel
Silica aerogel is the most common type of aerogel. It is the type of aerogel most frequently seen in photographs and what people generally refer to when using the word “aerogel” without an adjective in front (although there are many other types of aerogel).
Source: http://www.aerogel.org/?p=16
nice. aerogels are amazing. best insulators known to man :)
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