chlorite group
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group of phyllosilicate minerals
Key facts
- Category
- Phyllosilicate minerals
- Formula
- (Mg,Fe) 3 (Si,Al) 4 O 10 (OH) 2 · (Mg,Fe) 3 (OH) 6
- Ima symbol
- Chl
- Crystal system
- Monoclinic 2/m; with some triclinic polymorphs.
- Color
- Various shades of green; rarely yellow, red, or white.
- Crystal habit
- Foliated masses, scaley aggregates, disseminated flakes.
- Cleavage
- Perfect 001
- Fracture
- Lamellar
- Mohs scale hardness
- 2–2.5
- Luster
- Vitreous, pearly, dull
- Streak
- Pale green to grey
- Specific gravity
- 2.6–3.3
- Refractive index
- 1.57–1.67
- Other characteristics
- Folia flexible – not elastic
via Wikipedia infobox
Wikidata facts
- Image
- Adularia-Chlorite-Group-260072.jpg
Show 3 more facts
- Commons category
- Chlorite
- Mohs' hardness
- 2.5
- IMA Mineral Symbol
- Chl
via Wikidata · CC0
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Article
The chlorites are the group of phyllosilicate minerals common in low-grade metamorphic rocks and in altered igneous rocks.
Chlorite minerals do not contain the element chlorine. The name chlorite is from the Greek chloros (χλωρός), meaning "green", in reference to its color. Greenschist, formed by metamorphism of basalt or other low-silica volcanic rock, typically contains significant amounts of chlorite mineral (but not the chlorite ion, nor chlorine in any other form).
Connections
serpentine mineral subgroup
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lepidolite
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basalt
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pelite
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Brazil
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Greek
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Siberia
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chlorine
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International Standard Book Number
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mineral
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Irkutsk Oblast
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clay
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Minas Gerais
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digital object identifier
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quartz
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magma
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chemical formula
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igneous rock
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lithosphere
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metamorphic rock
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