Mcbirneyite

IMA formula: Cu₃(VO₄)₂

Crystallography: Triclinic. P1. a =5.3418(9) Å, b =6.5100(8) Å, c = 5.1798(7) Å, α = 88.61(1)°, β = 68.11(1)°, γ = 69.22(1)°. Z = 1.

Specimen #225. Mcbirneyite and lammerite. Yadovitaya fumarole, Second scoria cone, Northern Breakthrough (North Breach), Great Fissure eruption (Main Fracture), Tolbachik Volcanic field, Milkovsky District, Kamchatka Krai, Russia. FOV = 5.3 mm.