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Alumoklyuchevskite & Euchroite

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CHP1062286

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Description
Locality: 
Yadovitaya Fumarole, Second Scoria Cone, Great Fissure, Tolbachik Volcano, Kamchatka Krai, Russian Federation
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.2 × 2 × 1.3 cm
Description

rich specimen with many beautiful tuft of greenish-brown needles of alumoklyuchevskite with associate green tabular crystals of euchroite on matrix.

c. 8646

Mineral Data
What's on the rock

Alumoklyuchevskite

Formula: 
K3Cu3(Al,Fe3+)(SO4)4O2
Strunz: 
7.BC.45
Crystal System: 
Monoclinic
Hardness: 
2.0 - 2.5
Type Locality: 
Great Fissure eruption (Main Fracture), Tolbachik volcano, Kamchatka Oblast', Far-Eastern Region, Russia...

Euchroite

Formula: 
Cu2(AsO4)(OH)·3H2O
Strunz: 
8.DC.07
Crystal System: 
Orthorhombic
Hardness: 
3.5 - 4.0
Type Locality: 
Svätodušná (Svätoduška) deposit, Ľubietová (Libetbánya; Libethen), Banská Bystrica Co., Banská Bystrica Region, Slovakia

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