White phosphorus

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.

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Notion

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Science and technology

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What Wikipedia says

White phosphorus, yellow phosphorus, or simply tetraphosphorus (P4) is an allotrope of phosphorus. It is a translucent waxy solid that quickly yellows in light (due to its photochemical conversion into red phosphorus), for this reason, impure white phosphorus is called yellow phosphorus.

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

Image: BXXXD at German Wikipedia, CC BY-SA 3.0, via Wikimedia Commons.