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Sulfide

Nickeltyrrellite

CuNi₂Se₄
Crystal systemCubic
ClassSulfide
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Nickeltyrrellite specimen

Metallic inclusions of the extremely rare selenide mineral nickeltyrrellite (IMA 2018-110) from the famous El Dragon mine in Bolivia (known for its paragenesis of selenium minerals) in a polished section of a completely analyzed sample by SEM/EDS. — Photo: David Hospital · CC BY-SA 4.0

Nickeltyrrellite

Nickeltyrrellite is an IMA-recognized mineral species in the sulfide class, with the chemical formula CuNi₂Se₄.

It crystallizes in the cubic crystal system (space group Fd3m). It is a member of the Spinel structural group.

Key properties: specific gravity 7.36; Black streak; Metallic luster.

IMA symbol Nty, IMA status: approved, named in 2019.

Occurs as fracture fillings in krut’aite-penroseite by oxidizing, low-T, Cu-Ni-Co-Pb-bearing fluids altering quijarroite-hansblockite-watkinsonite-clausthalite-penroseite aggregates.

It is found associated with Cerromojonite, klockmannite, clausthalite, penroseite.

The prefix identifies the Ni-analogue of tyrrellite.

Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet. Browse more N minerals or help write this entry.