Erionit
Sign in to saveAlso known as erionite-(metal) zeolite series, erionite series, erionite subgroup
Erionite is a naturally occurring asbestiform mineral that belongs to a group of minerals called zeolites. It usually is found in volcanic ash that has been altered by weathering and ground water. Erionite forms brittle, wool-like fibrous masses in the hollows of rock formations and has an internal molecular structure similar to chabazite. This mineral is likely as toxic as asbestos; however, erionite is not currently regulated by the U.S. Environmental Protection Agency and there are no occupational exposure limits for erionite fibers. Erionite was first described by A.S. Eakle in 1898, as wh
Key facts
- Mineral.name
- Erionite
- Mineral.category
- Tectosilicate minerals
- Mineral.group
- Zeolite group
- Mineral.image
- Erionite-348877.jpg
- Mineral.imagesize
- 260px
- Mineral.IMAsymbol
- Eri
- Mineral.system
- Hexagonal
- Mineral.class
- Dihexagonal dipyramidal (6mmm) H-M symbol: (6/m 2/m 2/m)
- Mineral.symmetry
- P63/mmc (no. 194)
- Mineral.color
- White, Green, Gray, Orange
- Mineral.habit
- Acicular - Occurs as needle-like crystals (asbestosform).
- Mineral.cleavage
- [010] Distinct
- Mineral.fracture
- Splintery
- Mineral.mohs
- 3.5-4
- Mineral.luster
- Vitreous - silky
- Mineral.opticalprop
- Uniaxial (-)
- Mineral.refractive
- nω = 1.4711, nε = 1.474
- Mineral.birefringence
- δ = 0.0191
via Wikipedia infobox
Wikidata facts
- Named after
- wool
- Image
- Erionite-161794.jpg
Show 3 more facts
- Commons category
- Erionite
- streak color
- white
- crystal system
- orthorhombic crystal system
Sources (2)
via Wikidata · CC0
Article · Svenska
Erionit (engelska: Erionite) är ett naturligt förekommande fiberaktigt mineral som tillhör en grupp av mineraler som kallas zeoliter. Man hittar erionit vanligen i vulkanisk aska som har blivit förändrad genom väta och grundvatten. Erionit, som har fått sitt namn efter det grekiska ordet för ull, bildar sköra, ulliga fibrösa massor i hålrum i klippformationer. Vissa av egenskaperna hos erionit liknar egenskaperna hos asbest. I en by i Turkiet har ett flertal fall av lungcancer kunnat härledas till det lokalt brutna byggmaterialet som innehåller erionit. Det har lett till att en ny by har byggts dit befolkningen flyttas. Man överväger att jämna den gamla byn med marken.
Abstract from DBpedia / Wikipedia · CC BY-SA