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Formula: Na14Cu7(AsO4)8F2Cl2
Arsenate
Crystal System: Tetragonal
Specific gravity: 3.662 calculated
Colour: Sky-blue
Environments
Axelite is a relatively new mineral, approved in 2017 and to date (December 2023) 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, axelite is associated with
sylvite, halite,
arsmirandite, bradaczekite,
johillerite, tilasite,
ericlaxmanite, lammerite,
hematite, tenorite,
cassiterite,
pseudobrookite,
aphthitalite group sulphates,
anhydrite, fluoborite,
sanidine and
fluorophlogopite.
Axelite occurs as tabular, quadratic, rectangular or stronger distorted crystals up to
0.02 × 0.1 × 0.1 mm3, sometimes combined in interrupted crusts up to 0.4 mm across overgrowing
sylvite. It is transparent, sky-blue, with a vitreous lustre
(MM 87.1.109-117).
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