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chamosite

Phyllosilicate mineral member of the chlorite group

Entitymineral speciesQ420478

Also known as orthochamosite · clinochamosite

Instance of: mineral species
1
Sources
1.Stated in The IMA List of Minerals (September 2019)
View statement on Wikidata ↗
Subclass of: kaolinite-serpentine mineral group
1
Sources
1.Stated in Fleischer’s Glossary of Mineral Species 2014
View statement on Wikidata ↗

Overview

From Wikipedia, the free encyclopedia · Read full article · Text CC BY-SA 4.0

Chamosite is the Fe2+ end member of the chlorite group. A hydrous aluminium silicate of iron, which is produced in an environment of low-to-moderate-grade metamorphosed iron deposits, as grey or black crystals in oolitic iron ore. Like other chlorites, it is a product of the hydrothermal alteration of pyroxenes, amphiboles and biotite in igneous rock. The composition of chlorite is often related to that of the original igneous mineral, so that more Fe-rich chlorites are commonly found as replacements of the Fe-rich ferromagnesian minerals (Deer et al., 1992).

Overview

All data

27 statements · 41% with external sources · numbers in brackets are citations

Nickel-Strunz 9th edition (updated 2009): 9.EC.55
IMA status and/or rank: grandfathered mineral (G)
1
Sources
1.Stated in IMA/CNMNC List of Mineral Names (March 2007)
View statement on Wikidata ↗
Nickel-Strunz '10th ed', review of (9th ed/ 2009 update): 9.EC.55
1
Sources
1.Stated in MinDat
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Solid solution series with: clinochlore
1
Sources
1.Stated in MinDat
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Type locality (geology): Haut de Cry
1
Sources
1.Stated in MinDat
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Named after: Chamoson
1
Sources
1.Stated in A Dictionary of the Names of Minerals
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Crystal system: monoclinic crystal system
Mohs' hardness: 3
IMA Mineral Symbol: Chm
1
Sources
1.Stated in IMA–CNMNC approved mineral symbols
View statement on Wikidata ↗
Formula: (Fe²⁺,Mg,Al,Fe³⁺)₆(Si,Al)₄O₁₀(OH,O)₈
Strunz 8th edition (series ID, updated): VIII/E.09d
1
Sources
1.Stated in Mineralogische Tabellen : Eine Klassifizierung der Mineralien auf kristallchemischer Grundlage, mit einer Einfuhrung in die Kristallchemie (1982)
View statement on Wikidata ↗

On other databases

13 identifiers linking chamosite across the web's reference databases

Data quality

statements

41%

externally sourced

Source last edited September 27, 2026. AIDB refreshes this page daily.

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AIDB. (2026). chamosite (Q420478). Retrieved from https://aidb.si/e/chamosite-Q420478