IMA mineral species

Tetrataenite

FeNi

Tetrathenite is a native alloy of iron and nickel. Along with kamacite, tenite and antitenite, it is one of the four constituent minerals of iron meteorites, also present in siderolites and chondrites. They are also very rare in terrestrial rocks..

Gray White & Clear

Tetrataenite specimen — Tetrataenite-138026.jpg · Wikimedia Commons (see file page for author & license)

Properties

Chemical formula	FeNi
Elements	Fe, Ni
Crystal system	Monoclinic
Mohs hardness	—
Density	8.536 g/cm³
Streak	—
Color	—
IMA symbol	Ttae
Nickel–Strunz class	1.AE.10

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

🌍 Where it's found

Type locality (where it was first described): Estherville, United States

Type locality
Notable source / deposit
Country of origin

Marker positions are approximate (region or locality level). Type localities from Wikidata; notable sources curated by Crystopedia.

Learn more

Tetrataenite on Mindat.org
Wikipedia article
Wikidata item Q3985309 (source of this page's data – you can correct it there)