Adelite

Rarity: Common

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Notion

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Science and technology

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What Wikipedia says

The rare mineral adelite, is a calcium, magnesium, arsenate with chemical formula CaMgAsO4OH. It forms a solid solution series with the vanadium-bearing mineral gottlobite. Various transition metals substitute for magnesium and lead replaces calcium leading to a variety of similar minerals in the adelite–duftite group.

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

Image: David Hospital, CC BY-SA 4.0, via Wikimedia Commons.