Ce se mai poate obtine din sticla. Aerogeli

Un aerogel este o structura silicatica poroasa care este peste  98% goala, avand o densitate de o mie de ori mai mica decat a sticlei. Printre altele , se folosesc si pentru a capta praf  interstelar sau minifragmente de cometa.Deasemenea sunt foarte buni izolatori termici.

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