Perlite

Rarity: Uncommon

A topic a little better known than average, read and translated beyond its own country.

Rarity follows how well known the article is: its views on the French and English Wikipedia over a year, and the number of languages it exists in.

At a glance

Class

Notion

Domain

Science and technology

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What Wikipedia says

Perlite is an amorphous volcanic glass that has a relatively high water content, typically formed by the hydration of obsidian. It occurs naturally and has the unusual property of greatly expanding when heated sufficiently.

Excerpt from the Wikipedia article “Perlite”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: KENPEI, CC BY-SA 3.0, via Wikimedia Commons.