Properties
| Chemical formula | (NH₄,K,Pb)₈NaFe²⁺₄(SO₄)₅Cl₈ |
|---|---|
| Elements | N, H, K, Pb, Na, Fe, S, O, Cl |
| Crystal system | Orthorhombic |
| Mohs hardness | — |
| Density | — |
| Streak | — |
| Color | brown |
| IMA symbol | Acm |
| Nickel–Strunz class | 7.BC |
“—” 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
- Acmonidesite on Mindat.org
- Wikipedia article
- Wikidata item Q19717059 (source of this page's data – you can correct it there)
IMA mineral species
Orthorhombic
Brown