Phosphate, manganese-bearing mineral
Specific gravity: 2.58 measured
Fanfaniite is a relatively new mineral, approved in 2018.
At the Hagendorf South Pegmatite, Hagendorf, Waidhaus, Neustadt an der Waldnaab District, Upper Palatinate, Bavaria, Germany, fanfaniite occurs as isolated very thin laths on the surface of fibrous spheroids of kayrobertsonite and associated with altered triplite–zwieselite, whiteite-(CaMnMn), fluorapatite, nordgauite, morinite, fluellite and aluminium-bearing strunzite (EJM 31.1.647-652, AM 106.9.1537-1543).
At the type locality, the Foote Lithium Co. Mine, Kings Mountain Mining District, Cleveland county, North Carolina, USA, the secondary phosphate mineral fanfaniite forms radial aggregates up to 0.5 mm in diameter of colourless, transparent, thin blades, associated with whiteite-(CaMnMn), zwieselite, triplite and kayrobertsonite (EJM 31.1.647-652, Mindat).
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