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Alumotantite

Posted by Rock Currier  
avatar Alumotantite
May 13, 2009 07:58AM
©


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This article is a place holder and needs someone to take it in hand and finish the first draft. If you would like to take this article in hand, leave a reply message below or contact Rock Currier via private message by clicking on the PM button next to my name at the top of the article.



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Can you help make this a better article? What good localities have we missed? Can you supply pictures of better specimens than those we show here? Can you give us more and better information about the specimens from these localities? Can you supply better geological or historical information on these localities?

Below are some preliminary notes I have made about Alumotantite. This entry and thread has been made as a place holder for information that you will hopefully contribute about Alumotantite. It should be in no way be thought of as a claim I have staked out to write about this mineral, and in fact is an invitation for someone to step forward and create the article about this mineral. If you are so inclined and have questions about the format that such an article should have, go the The welcome topic at the top of the Best Minerals forum and read what has been posted there. Also take a look at some of the more mature articles that have already been written like Rhodochrosite, Adamite, Millerite etc.



Alumotantite
AlTaO4 Orthorhombic
Alumotantite, Alto do Giz pegmatite, Equador,RGN, Brazil 1.5cm wide© Arliguie M


Alumotantite
Brazil
Northeast Region, Rio Grande do Norte, Borborema mineral province, Equador, Alto do Giz pegmatite

*Alumotantite Micro and rare species collections.
AlTaO4
This mineral has been found at the Mdara mine, Bikita, Zimbabwe and the Alto do Giz pegmatite, near Parelhas, Rio Grande do Norte, Brazil and the Russian locality described below.
Russia
Kola Peninsula, Voron’ya Tundra, Vasin-Myl’k Mountain. In a granitic pegmatite “Alumotantite forms rims around crystals of simpsonite and also rims natrotantite.”1 Other associated minerals were microlite, cesstibtantite, sosedkoite and albite. “Crystals are euhedral to subhedral to 1 mm, elongated with rhombic to rectangular cross-section.”2 This is a rare mineral. Perhaps no more than two small specimens. The mineral is not recognizable by eye. Anatoliy Voloshin collected the type material and co-authored the description. A few probe mounts (10?) were made and analyzed with an EDS (energy dispersive spectrometer). Each probe mount contained perhaps four rock fragments less than 5 mm each in which the mineral was identified. Fragments (quarter sections) of these probe mounts found their way to the rare specimen market and were purchased by a few collectors and museums.1 The type material is located in the Geology Museum of the Academy of Sciences, Apatity, Russia.
1 American Mineralogist, Vol.67, p.413, 1982. - 2 Handbook of Mineralogy, Volume lII, Anthony, Bideaux, Bladh, Nichols, p10. 3 Dimitry Belakowski, personal communication 2003.

Three localities listed on mindat.



Click here to view Best Minerals A and here for Best Minerals A to Z and here for Fast Navigation of completed Best Minerals articles.

Rock Currier
Crystals not pistols.



Edited 2 time(s). Last edit at 12/27/2012 08:46PM by Rock Currier.
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