fuchsite
Sign in to saveFuchsite, also known as chrome mica, is a chromium (Cr)-rich variety of the mineral muscovite, belonging to the mica group of phyllosilicate minerals, with the chemical formula .
Key facts
- Mineral.name
- Fuchsite
- Mineral.category
- Phyllosilicate minerals
- Mineral.group
- Mica group, dioctahedral mica group
- Mineral.IMAstatus
- Variety of muscovite
- Mineral.image
- Verdite (microcrystalline fuchsite metamorphite) South Africa.jpg
- Mineral.caption
- Verdite, a microcrystalline metamorphic rock, is composed mostly of green fuchsite. This specimen (6.5 cm across at its base), of Archean age, is from Barberton, Mpumalanga, South Africa
- Mineral.system
- Monoclinic
- Mineral.color
- Light to medium green
- Mineral.habit
- Curved aggregates
- Mineral.cleavage
- Perfect basal
- Mineral.fracture
- Uneven
- Mineral.mohs
- 2.5
- Mineral.luster
- Vitreous to pearly
- Mineral.refractive
- 1.552–1.615
- Mineral.opticalprop
- Biaxial (–)
- Mineral.birefringence
- 0.036
- Mineral.dispersion
- weak
- Mineral.streak
- White
via Wikipedia infobox
Wikidata facts
- Instance of
- mineral variety
- Subclass of
- muscovite
- Named after
- Johann Nepomuk von Fuchs
- Image
- Verdite (microcrystalline fuchsite metamorphite) South Africa.jpg
Show 2 more facts
- Commons category
- Fuchsite
- streak color
- white
Sources (1)
via Wikidata · CC0
~1 min read
Encyclopedic overview
3 sectionsContents
- Properties
- References
- External links
Fuchsite, also known as chrome mica, is a chromium (Cr)-rich variety of the mineral muscovite, belonging to the mica group of phyllosilicate minerals, with the chemical formula .
Trivalent chromium replaces one of the aluminium (Al) atoms in the general muscovite formula producing the apple green hue distinctive of fuchsite. It is often found in minute micaceous aggregates (with individual plates barely visible), as a major component of chromium rich phyllitic or schistose metamorphic rocks of the greenschist facies.
Excerpted from Wikipedia’s “fuchsite” article, available under the CC BY-SA 4.0 licence.