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Ferro-obertiite (of Hawthorne et al. 2010)

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An amphibole (IMA 2009-034) with the empirical formula (Na0.72K0.29)(Na1.85Ca0.15)(Mg1.30Fe2+2.35Mn2+0.02Fe3+0.52Al0.01Ti0.75Li0.10)(Si7.99Al0.01)O22(O1.16F0.25OH0.59) was originally named ferro-obertiite by Hawthorne et al (2010). It was re-named ferro-ferri-obertiite in 2012 to align the use of pre-fixes in the obertiite root name minerals with the general amphibole nomenclature rules.

References for Ferro-obertiite (of Hawthorne et al. 2010)

Reference List:
Hawthorne, F.C., Ball, N.A., Czamanske, G.K. (2010): Ferro-obertiite, NaNa2(Fe2+Fe3+Ti)Si8O22O2, new mineral of the amphibole group from Coyote Peak, Humboldt County, California. Canadian Mineralogist, 48, 301-306.

Frank C. Hawthorne, Roberta Oberti, George E. Harlow, Walter V. Maresch, Robert F. Martin, John C. Schumacer, Mark D. Welch (2012): Nomenclature of the amphibole supergroup, American Mineralogist, 97, 2031–2048.

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