Vanadium(III) oxide

Rarity: Uncommon

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

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Notion

Domain

Science and technology

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What Wikipedia says

Vanadium(III) oxide is the inorganic compound with the chemical formula V2O3. It is a black basic oxide dissolving in acids to give solutions of vanadium(III) complexes. Upon exposure to air it gradually converts into indigo-blue VO2. It occurs as the rare mineral karelianite.

Excerpt from the Wikipedia article “Vanadium(III) oxide”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: P.R. Binter (Photographer), Public domain, via Wikimedia Commons.