IMA mineral species

Valleriite

2[(Fe,Cu)S]·1.53[(Mg,Al)(OH)₂]

Uncommon sulfide-hydroxide mineral of iron and copper.

YellowBrownGray

Valleriite specimen
Valleriite, Magnetite-627472.jpg · Wikimedia Commons (see file page for author & license)

Properties

🔷 Trigonal✏️ streak black
Chemical formula2[(Fe,Cu)S]·1.53[(Mg,Al)(OH)₂]
ElementsFe, Cu, S, Mg, Al, O, H
Crystal systemTrigonal
Mohs hardness—
Density—
Streakblack
Color—
IMA symbolVal
Nickel–Strunz class2.FD.30

“—” means no reliable value in Wikidata yet. Check Mindat for full data.