Willyamite, Chalcopyrite, Quartz

Specimen ID: 0TT-MVX

Mineral(s)
Willyamite : CoSbS
Chalcopyrite : CuFeS2
Quartz : SiO2
Locality
Mindat locality:
Events

Photo added to mindat.org

Willyamite grain (bright), partly intergrown with a chemically inhomogeneous partial pseudomorph of Cu(-Fe)-sulphides after chalcopyrite (grey), in quarz matrix (dark). The chemnical composition of the willyamite grain varies from the core [ (Co0.79Ni0.17Fe0.04)SbS0.99Se0.01, (Co0.76Ni0.18Fe0.06)SbS0.9Se0.01] to the (Ni-poorer and Fe-free) rim (Co0.91Ni0.09)SbS. SEM micrograph (BSE mode) of polished section of an ore sample (NHM Vienna inventory no. O 1065). This photo was originally published in: Kolitsch, U., Schachinger, T., Auer, C., Grill, J. (2019): 2124) Arsenopyrit, Sb-haltiger Bismuthinit, Bornit, Brannerit, S-reicher Clausthalit, Cobaltit, Covellin, Cubanit, teils Se-reicher Galenit, Gold, eine (Au,Ag,Hg)-Legierung (~Au3Ag2Hg), Klinochlor, Kobellit, Limonit, Metatorbernit, Metazeunerit, Monazit-(Ce), Muskovit, Pyrit, Pyrrhotin, Quarz, Rutil, Segnitit, Skorodit, Tetraedrit, Tintinait, Willyamit, Xenotim-(Y), Zirkon und das Se-Analogon von Joséit-A vom Oberhüttensee, Forstautal, Radstätter Tauern, Salzburg – ein Vorbericht. Pp. 278-284 in Walter, F. et al. (2019): Neue Mineralfunde aus Österreich LXVIII. Carinthia II, 209./129., 237-362.
Uwe Kolitsch - 13th November 2019
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