Krasheninnikovite

krasheninnikovite

euchlorine

blodite

vergasovaite

Images

Formula: KNa₂CaMg(SO₄)₃F
Sulphate
Crystal System: Hexagonal
Specific gravity: 2.68 measured, 2.67 calculated
Hardness: 2½ to 3
Colour: Colourless, white
Environments

Fumeroles

Krasheninnikovite was approved in 2011 and to date (May 2023) has been reported only from the type locality, in three different fumeroles.

Localities

At the type locality, the Second scoria cone, Northern Breakthrough, Great Fissure eruption, Tolbachik volcano, Kamchatka Krai, Russia, The eruption of 1975-76 formed the Southern and Northern Breakthrough; the eruption created several new cinder cones, and in terms of volume of lava emitted, was Kamchatka's largest basaltic eruption in historic times.
Krasheninnikovite is found in the sublimates of an active fumarole, associated with tenorite, thénardite, hematite, euchlorine, blödite, vergasovaite and fluorophlogopite. Krasheninnikovite forms long-prismatic to acicular crystals up to 3 mm long and up to 20 µm thick. The crystals are combined in sheaf-like, radiating or open-work matted aggregates forming nests up to several cm³ or crusts. Krasheninnikovite is transparent, colourless in individuals and white in aggregates, with a vitreous lustre (AM 97.1788-1795).

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