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General Nukundamite Information ... Nukundamite Image ... Nukundamite Covellite...
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Metallic brownish rim of nukundamite with dark purplish-blue covellite on fine-grained pyrite. Ronneburg U deposit, Gera district, Thuringia, Germany.
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Nukundamite (Cu, Fe)4S4; c 2001-2005 Mineral Data Publishing, version 1; Crystal Data: Hexagonal. Point Group: 3 2/m. Tabular hexagonal crystals, to 2 mm, in fan-shaped groups; also as larger irregular masses, to 4 cm long, rarely with a palmlike branching structure;
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Nukundamite-bearing copper ore, restricted to a 240-m-thick quartzite unit of the Pennsylvanian Bingham Mine Formation, extends 170 m from the northeast margin of the mineralized stock along the strike of beds and plunges 1 km down the dip of beds (30° NNW). The quartzite unit is cut off at depth by a thrust fault,
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Nukundamu,, massive, as fine lamellae in sphal, cavity filling in, nukundamite, Ottemann (1967);. Fiji, sulfide, brecciated py ore with qtz and opal ...
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Crystals corresponding to nukundamite were obtained by hydrothermal synthesis .... Scanning electron micrographs for hydrothermally-synthesized nukundamite. ...
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Kojima & Ueno (1994) studied thermodynamic constraints on nukundamite-bearing assemblages, but did not consider the effect of nonstoichiometry of bornite on Reactions 2 and 3. All reported compositions of bornite in Reactions 2 and 4 have a higher Cu:Fe ratio than nukundamite, whereas stoichiometric bornite has a lower...
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At temperatures below 300℃ restricted areas of metastable solid solution exist in the bornite(bn)-chalcopyrite(cp)-idaite(id)-nukundamite(nk) area of the Cu-Fe-S system;
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RRUFF Home | UA Mineralogy | Caltech Mineralogy | The IMA Mineral List | Login · Search Sample DataSearch ReferencesAbout RRUFF Contact Us ...
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Nukundamite is an important ore mineral in a geologic resource of approximately 90 ... deposits, where nukundamite occurs as a minor phase in relatively low ...
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