Kutnohorite

Kutnohorite

Kutnohorite is a rare calcium manganese magnesium iron carbonate mineral with formula Ca(Mn,Mg,Fe)(CO3)2. It is a manganese rich analogue of the dolomite-ankerite series. It crystallizes in the trigonal system and occurs as massive to bundled blades of white through rose pink to light brown crystal forms. The pink shades are due to increased manganese where as the brown colors are due to increased iron content. It shows the perfect three directions of cleavage typical of carbonates. It has a Mohs hardness of 3.5 to 4 and a specific gravity of 3.1 - 3.12. It is translucent to transparent with refractive index values of nω = 1.727 and nε = 1.535.

It was first described in 1901 and named for its type locality of Kutna Hora, Bohemia, Czech Republic.

References

* [http://www.mindat.org/min-2299.html Mindat with location data]
* [http://www.webmineral.com/data/Kutnohorite.shtml Webmineral data]


Wikimedia Foundation. 2010.

Нужна курсовая?

Look at other dictionaries:

  • Kutnohorite — Catégorie V : carbonates et nitrates[1] Kutnohorite aragonite Levane Italie (Vue …   Wikipédia en Français

  • kutnohorite — ▪ mineral       a carbonate mineral, calcium manganese carbonate [CaMn(CO3)2]. Confirmed as a naturally occurring species in 1955, it was originally found at Kutná Hora, Bohemia; it also occurs in Franklin, N.J., U.S., and Chvaletice, Czech… …   Universalium

  • kutnohorite — noun A rare calcium manganese magnesium iron carbonate mineral with trigonal crystals, having a white, pink or brown colour …   Wiktionary

  • Kutnohorit — (Kutnahorit, Mangandolomit) Nadeliger, radialstrahliger Kutnohorit (möglicherweise vermischt mit etwas manganhaltigem Calcit) aus der „Wessels Mine“, Hotazel, Kalahari, Südafrika Chemische Formel CaMn[CO3]2 …   Deutsch Wikipedia

  • Ankérite — Catégorie V : carbonates et nitrates[1] Ankérite sur quartz Huaron Pérou …   Wikipédia en Français

  • Dolomite — Pour les articles homonymes, voir Dolomite (homonymie). Dolomite Catégorie V : carbonates et nitrates[1] …   Wikipédia en Français

  • List of minerals K-M (complete) — It is currently not possible to have a complete list of minerals . The International Mineralogical Association is the international group that recognises new minerals and new mineral names, however minerals discovered before 1959 did not go… …   Wikipedia

  • Dolomite — This article is about the rock and mineral. For other uses, see Dolomite (disambiguation). Dolomite Dolomite and magnesite – Spain General Cat …   Wikipedia

  • List of minerals — This is a List of minerals for which there are Wikipedia articles. Mineral variety names and mineraloids are to be listed after the valid minerals for each letter.For a complete listing (about 4,000) of all mineral names: List of minerals… …   Wikipedia

  • Axinite — – Deposit Topotype, France General Category Borosilicates Chemical formula …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”