Referenzen
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A mineral with the empirical formula (K0.18Na0.84)(Na1.86Ca0.08Fe2+0.06)(Mg3.09Zn0.01Li0.03Fe3+0.29Mn3+0.37Fe2+0.41Ti4+0.86Al0.03)Si8.00O22(OH)0.20F0.26O1.54 was published by Hawthorne et al (2000) as obertiite, but was later renamed ferri-obertiite and then mangani-obertiite. See the respective mineral pages for further details.
Hawthorne, Frank C., Cooper, Mark A., Grice, Joel D., Ottolini, Luisa (2000) A new anhydrous amphibole from the Eifel region, Germany: Description and crystal structure of obertiite, NaNa2(Mg3Fe3+Ti4+)Si8O22O2. American Mineralogist, 85 (1) 236-241 doi:10.2138/am-2000-0124
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