Minerals, Volume 10, Issue 8 (August 2020) – 81 articles
Cover Story (view full-size image): Vermiculite is a layered silicate mineral with 2:1 crystalline structure and a broad diversity in charged layers associated with numerous isomorphic substitutions, disorder effects, dehydration–rehydration ability and swelling processes. Vermiculites are more abundant and much cheaper compared to other clays, with the same benefits. Therefore, they represent an interesting mineral for numerous environmental, constructional and agricultural applications. In this article, nitric acid was used to exfoliate some vermiculites to a degree that dramatically increased their specific surface area and altered their iron content, and the effect was even greater for the thermoexfoliated vermiculite. The cover image shows a light microscope image for one of these exfoliated vermiculites. View this paper
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