IMA mineral species

Hilarionite

Fe³⁺₂(SO₄)(AsO₄)(OH)·₆H₂O

Hydrous sulfate-arsenate mineral.

Hilarionite specimen — Hilarionite8146-4.jpg · Wikimedia Commons (see file page for author & license)

Properties

🔷 Monoclinic

Chemical formula	Fe³⁺₂(SO₄)(AsO₄)(OH)·₆H₂O
Elements	Fe, S, O, As, H
Crystal system	Monoclinic
Mohs hardness	—
Density	—
Streak	—
Color	—
IMA symbol	Hrn

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

🌍 Where it's found

Type locality (where it was first described): Hilarion mine, Greece

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

Hilarionite on Mindat.org
Wikidata item Q19841429 (source of this page's data – you can correct it there)