Hubnerita de la pegmatita El Peñón, Nevados de Palermo, Salta

GALLISKI M. A. CERNÝ P.

Mineralogía y Metalogenia 2002

Universidad de Buenos Aires

Lugar: Buenos Aires; Año: 2002; p. 160 - 163

Hübnerite forms a 1 x 1.8 cm brown crystal enclosed in a late-stage association of platy albite and minorquartz and muscovite in a beryl-columbite-phosphate-subtype, beryl-type, rare-element class pegmatite.Chemical analysis by electron microprobe gave: WO 3 78.45, Nb205 0.07, TiO2 0.02, Sc203 0.01, Sb203 0.04,MnO 21.16, FeO 1.58, CaO 0.02 and the formula unit of (M nos9Fe007)W1 0104 . Unit-cell dimentions are a =4,822(1), b = 5,755(1), c = 4,991(1) A, n= 91,05°(1), V= 138,47(2) A3 . The textura) relationships show thathübnerite crystallized as a primary phase. lis formation, after montebrasite, tapiolite, uraninite andmanganotantalite, but in close association with this minerals at the end of the pegmatite consolidation,strongly suggests that hübnerite crystallized within the closed pegmatite system.