Chemistry:Achyrophanite
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| Achyrophanite | |
|---|---|
| General | |
| Category | Mineral |
| Formula (repeating unit) | (K,Na)3(Fe3+,Ti,Al,Mg)5O2(AsO4)5 |
| Strunz classification | 8.BF.30 |
| Crystal system | Orthorhombic |
| Identification | |
| Color | Straw-yellow to golden yellow |
| Cleavage | Perfect (001) |
| Fracture | Irregular/Uneven |
| Tenacity | Brittle |
| |re|er}} | Vitreous |
| Streak | White |
| Specific gravity | 3.814 |
| Density | 3.814 g/cm3 |
| References | https://www.mindat.org/min-52919.html |
Achyrophanite ((K,Na)3(Fe3+,Ti,Al,Mg)5O2(AsO4)5) is a yellow mineral, discovered in 2018 and described in 2025.[1]
Its name comes from the Greek words άχυρον (straw) and φαίνομαι (to appear), hinting at its straw like appearance.
Its type locality is the Tolbachik Volcano in Kamchatka, Russia.[2]
References
 |  |
- ↑ "Achyrophanite". https://www.mindat.org/min-52919.html.
- ↑ Pekov, Igor V.; Zubkova, Natalia V.; Koshlyakova, Natalia N.; Belakovskiy, Dmitry I.; Vigasina, Marina F.; Agakhanov, Atali A.; Britvin, Sergey N.; Turchkova, Anna G. et al. (2025-07-02). "Achyrophanite, (K,Na)3(Fe3+,Ti,Al,Mg)5O2(AsO4)5, a New Mineral with the Novel Structure Type from Fumarolic Exhalations of the Tolbachik Volcano, Kamchatka, Russia" (in en). Minerals 15 (7): 706. doi:10.3390/min15070706. ISSN 2075-163X.
