Elasmochloite

elasmochloite

Images

Formula: Na₃Cu₆BiO₄(SO₄)₅
Sulphate, bismuth-bearing mineral
Crystal System: Monoclinic
Specific gravity: 3.844 calculated
Colour: Green
Environments

Fumeroles

Elasmochloite is a relatively new mineral, approved in 2018 and to date (January 2024) reported only from the type locality.

Localities

At the type locality, the Arsenatnaya fumarole, Second scoria cone, Northern Breakthrough, Great Fissure eruption, Tolbachik Volcanic field, Milkovsky District, Kamchatka Krai, Russia, elasmochloite was found associated with tenorite, hematite, langbeinite, aphthitalite, krasheninnikovite and johillerite. Elasmochloite occurs as lamellar crystals up to 0.005 × 0.07 × 0.1 mm³ in size, separate or combined into open-work clusters up to 0.3 mm across. It is transparent and green with a vitreous lustre (EJM 31.5.1025-1032).

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