Nacrite

Rarity: Common

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At a glance

Class

Notion

Domain

Science and technology

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What Wikipedia says

Nacrite Al2Si2O5(OH)4 is a clay mineral that is polymorphous (or polytypic) with kaolinite. It crystallizes in the monoclinic system. X-ray diffraction analysis is required for positive identification.

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

Image: Ra'ike, CC BY-SA 3.0, via Wikimedia Commons.