One analysis of a pale pink Namibian tourmaline indicated fluorine-rich rossmanite (Giller , 2003). This is potentially a new mineral, that corresponds to the hypothetical mineral named fluor-rossmanite in the scheme of Hawthorne and Henry (1999)
Composition:
[]0.45Na0.45Ca0.10[Al1.70Li1.23Mn0.04Fe0.02]Al6(BO3)3[Si5.88Al0.12](OH)3.45F0.55
References:
Giller BS (2003) An overview of tourmaline mineralogy from gem tourmaline producing pegmatite districts in Africa. Master of Science Thesis, University of New Orleans, LA. http://etd-db.uno.edu/theses/submitted/etd-05062003-151714/unrestricted/2003_05_ms_giller_brian.pdf
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Updated: 27-Mar-2014