Magganasite

IMA formula: CuFe³⁺₃O(AsO₄)₃

Crystallography: Triclinic. P-1. a = 5.1813(7) Å, b = 9.6427(11) Å, c = 9.6834(11) Å, α = 82.066(10)°, β = 78.680(11)°, γ = 79.962(10)°. Ζ = 2.

Specimen #209. Maggnasaite. Arsenatnaya fumarole, Second scoria cone, Northern Breakthrough (North Breach), Great Fissure eruption (Main Fracture), Tolbachik Volcanic field, Milkovsky District, Kamchatka Krai, Russia. FOV 2.4 mm.