Euchlorine

IMA formula: KNaCu₃O(SO₄)₃

Crystallography: Monoclinic. C2/c. a = 18.131(15) Å, b = 9.386(8) Å, c = 14.353(12) Å, β = 113.217(12)°. Z = 8.

Specimen #49. Euchlorine and melanothallite. Second scoria cone, Northern Breakthrough (North Breach), Great Fissure eruption (Main Fracture), Tolbachik Volcanic field, Milkovsky District, Kamchatka Krai, Russia. FOV 6.8 mm.