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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, Alto do Giz pegmatite, Equador,RGN, Brazil 1.5cm wide
AlumotantiteBrazilNortheast 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.