Spionkopite
Spionkopite is an IMA-recognized mineral species in the sulfide class, with the chemical formula Cu₃₉S₂₈.
Key properties: specific gravity 5.13; Metallic luster.
IMA symbol Spi, IMA status: approved, named in 1978.
Occurs as weathering-produced lamellar replacements of anilite and djurleite in stratabound red-bed copper deposits (Spionkop Creek, Canada); in a serpentine-hosted magnetite-chromite deposit (Eretria, Greece).
It is found associated with Anilite, djurleite, yarrowite, tennantite (Yarrow and Spionkop Creeks, Canada); geerite, chalcopyrite, cobalt pentlandite, magnetite, chromite, andradite.
The name is derived from the locality at Spionkop Creek, Canada.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet.
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