IMA mineral species
Walpurgite
(BiO)₄(UO₂)(AsO₄)₂·2H₂O
Uranyl arsenate mineral.
Properties
⛏ Mohs hardness3.5
💅🪙🍶🔪💎
A copper coin scratches it.
| Chemical formula | (BiO)₄(UO₂)(AsO₄)₂·2H₂O |
|---|---|
| Elements | Bi, O, U, As, H |
| Crystal system | Triclinic |
| Mohs hardness | 3.5 |
| Density | — |
| Streak | — |
| Color | — |
| IMA symbol | Wpg |
| Nickel–Strunz class | 8.EA.05 |
“—” means no reliable value in Wikidata yet. Check Mindat for full data.
Care & Handling
- 🪶 Soft, Scratches Easily Mohs 3.5: softer than a steel knife, so it scratches easily. Store it apart from harder stones.
🌍 Where it's found
Type locality (where it was first described): Walpurgis Flacher vein, Germany
Learn more
- Walpurgite on Mindat.org
- Wikidata item Q1531254 (source of this page's data – you can correct it there)
IMA mineral species
3–4
Triclinic
Soft, Scratches Easily