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Formula: K3Na3Fe3+6(AsO4)8
Anhydrous arsenate, forms a solid-solution series with
ozerovaite
Crystal System: Orthorhombic
Specific gravity: 3.596 calculated
Hardness: ~3
Colour: Light green, pale greenish, yellowish greenish or yellowish
Environments
Pansnerite is a relatively new mineral, approved in 2016 and to date (July 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, pansnerite was found associated with
aphthitalite, hematite,
sanidine, badalovite,
khrenovite, achyrophanite,
arsenatrotitanite,
ozerovaite, tilasite,
calciojohillerite,
johillerite, nickenichite,
svabite, katiarsite,
yurmarinite, anhydrite,
rutile, cassiterite and
pseudobrookite.
Pansnerite forms tabular to lamellar, usually pseudo-hexagonal, crystals up to 0.2 × 0.7 × 1 mm3
and crystal clusters up to 2 mm across. It is transparent to translucent, light green, pale greenish,
yellowish–greenish or yellowish, with vitreous lustre
(MM 84.1.143–151).
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