eskolaite
Sign in to saveEskolaite is a rare chromium oxide mineral (chromium(III) oxide Cr2O3).
Key facts
- Mineral.name
- Eskolaite
- Mineral.image
- Eskolaite.jpg
- Mineral.imagesize
- 260px
- Mineral.caption
- Eskolaite from Russia
- Mineral.category
- Oxide mineral
- Mineral.formula
- Cr2O3
- Mineral.IMAsymbol
- Esk
- Mineral.strunz
- 4.CB.05
- Mineral.system
- Trigonal
- Mineral.class
- Hexagonal scalenohedral ( m) H-M symbol: ( 2/m)
- Mineral.symmetry
- Rc, No. 167
- Mineral.unit cell
- a = 4.95, c = 13.58 [Å]; Z = 6
- Mineral.color
- Black to dark green
- Mineral.habit
- Hexagonal prisms and plates
- Mineral.cleavage
- None
- Mineral.tenacity
- Brittle
- Mineral.mohs
- 8 – 8.5
- Mineral.luster
- Vitreous or metallic
via Wikipedia infobox
Article
4 sectionsContents
- Discovery and occurrence
- Structure and physical properties
- See also
- References
Eskolaite is a rare chromium oxide mineral (chromium(III) oxide Cr2O3).
==Discovery and occurrence== It was first described in 1958 for an occurrence in the Outokumpu ore deposit of eastern Finland. It occurs in chromium bearing tremolite skarns, metamorphosed quartzites and chlorite bearing veins in Finland; in glacial boulder clays in Ireland and in stream pebbles in the Merume River of Guyana. It has also been recognized as a rare component in chondrite meteorites.