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Sulfosalt

Kutinaite

Ag₆Cu₁₄As₇
Hardness4.5
Crystal systemCubic
ClassSulfosalt
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Kutinaite specimen

Black metallic crystals of the extremely rare Ag-sulphosalt mineral kutinaite from the type locality: Cerný Dul (Schwarzenthal), Krkonoše, Bohemia, Czech Republic. Ex. Dr.Hartel collection. — Photo: David Hospital · CC BY-SA 4.0

Kutinaite

Kutinaite is an IMA-recognized mineral species in the sulfosalt class, with the chemical formula Ag₆Cu₁₄As₇.

It crystallizes in the cubic crystal system (space group Pm-3m).

Key properties: Mohs hardness 4.5; specific gravity 8.38; Metallic. R: (400) 49.6, (420) 48.8, (440) 48.0, (460) 46.8, (480) 45.6, (500) 44.5, (520) 43.5, (540) 42.6 luster.

IMA symbol Kti, IMA status: approved, named in 1969.

Found in carbonate-rich hydrothermal veins (Černý Důl mine, Czech Republic).

It is found associated with Novákite, koutekite, paxite, arsenolamprite, löllingite (Černý Důl mine, Czech Republic); allargentum, koutekite, domeykite (Wasserfall, France); koutekite.

The name refers to Dr. Jan Kutina (1924–), Lecturer at the Charles University, Prague, Czech Republic.

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 K minerals or help write this entry.