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Improving Mindat.orgabout Foitite from Erongo

7th Jun 2013 08:00 UTCFerdinando Giovine

This is a email by Prof. Al Falster in 2007 about my samples of tourmalins and micas from Erongo:

Hello Ferdinando, it is great to ehar from you. Tourmaline like the one shown, I collected there in 2003. Whenever the surfaces were very shiny and not broken into more fibrous structures, it was a good schorl with large but not dominant X-site vacancy. Once fibrous crystals formed, foitite was typically present. The micas we analyzed were mostly relatively low-Li muscovites and biotites with some higher Li-content.

best wishes,

Al

7th Jun 2013 10:48 UTCFerdinando Giovine

In Erongo Mountain http://www.mindat.org/loc-21818.html is written: NOTE on the mineral list: Foitite has not been reliably confirmed yet from the Erongo region

7th Jun 2013 10:58 UTCUwe Kolitsch Manager

You can add it with the ref.: "Ferdinando Giovine collection (analysed by Prof. Al Falster)".


I guess Prof. Falster used EPMA for identification. I wonder what the F contents were - I had analysed fluor-schorl on some samples.

7th Jun 2013 12:07 UTCFerdinando Giovine

Can I delete the note in mindat page and change the reference in Foitite?

7th Jun 2013 13:32 UTCUwe Kolitsch Manager

All done/updated.

11th Jun 2013 00:21 UTCStuart Mills Manager

The tourmaline like this http://www.mindat.org/photo-373591.html is foitite (SXRD, probe) confirmed by me.
 
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