IMA mineral species

Thermessaite-(NH4)

(NH₄)₂AlF₃(SO₄)

Ino-fluoro-aluminate mineral.

Thermessaite-(NH4) specimen — Thermessaite-(NH₄).webp · Wikimedia Commons (see file page for author & license)

Properties

🔷 Orthorhombic

Chemical formula	(NH₄)₂AlF₃(SO₄)
Elements	N, H, Al, F, S, O
Crystal system	Orthorhombic
Mohs hardness	—
Density	—
Streak	—
Color	—
IMA symbol	Tms-NH4

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

🌍 Where it's found

Type locality (where it was first described): La Fossa crater, Italy

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

Thermessaite-(NH4) on Mindat.org
Wikidata item Q19862003 (source of this page's data – you can correct it there)