Anandite

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Anandite, also known as Anandite-2O in English and Adandit or Anandit in German, or Анандит in Russian,[1] is a type of mineral that forms crystals. The crystals are usually monoclinic in shape and they usually grow in large clumps on the same rock.[2] Because of how bad the face of the mineral is in, the flakes of crystal that shed off of the mineral actually look hexagonal in shape instead of the normal monoclinic shape.[3] It is black in color and has a glassy luster and a near perfect cleavage.[2][4] It has a molecular weight of 593.15 grams.[5] Its chemical formula is Ba2(Fe2+,Mg)3(Fe2+,Fe3+)3[OH|(S,Cl)|(Fe3+,Si)2Si2O10}2.[4][5]

It was discovered in the year 1967.[6] It can be found in the Wilagedera Prospect of the North Western Province of Sri Lanka in bands of iron ore.[1][5][7] Other samples of Anandite have been found in Big Creek, California in Fresno County and in Trumball Peak in Mariposa county, as well as the Sterling Mine in New Jersey,[1] but Anandite very rarely occurs in nature.[4] It was named for Ananda Kentish Coomaraswamy, who was the director of the Mineral Survery of Ceylon, Sri Lanka at that time.[5][7]

Anandite is a member of the Mica group of minerals.[3][8] Anandite is composed of potassium, barium, magnesium, aluminum, iron, silicon, hydrogen, and oxygen.[5] Other minerals that anandite is related to include: magnetite, chalcopyrite, pyrite, pyrrhotite, and barite.[3] There are no known health risks associated with Anandite, even though Anandite has a very minuscule amount of radioactivity.[5]

[edit] References

  1. ^ a b c Jolyon & Ida Ralph. Anandite mineral information and data. Mindat.org. Retrieved on 2008-05-04.
  2. ^ a b Anandite Mineral Data. Mineralcollecting.org. Retrieved on 2008-05-04.
  3. ^ a b c PDF data sheet for Anandite in the Handbook of Mineralogy.. Handbook of Mineralogy. Mineral Data Publishing (2001). Retrieved on 2008-05-04.
  4. ^ a b c Mineral Information System's fact sheet on Anandite. Mineral Information System. Retrieved on 2008-05-04.
  5. ^ a b c d e f Anandite mineral data sheet. Webmineral.com. Retrieved on 2008-05-04.
  6. ^ Information sheet about Anandite (French). Retrieved on 2008-05-04.
  7. ^ a b University of Helsinki report on Anandite. Mineralogical Society (1967). Retrieved on 2008-05-04.
  8. ^ Pierre Peroud. Athena Mineral data sheet for Anandite. Retrieved on 2008-05-04.

[edit] External links

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