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Posnjakite

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MNR627462

Posnjakite

Classic Locality

Description Tabs

Description
Locality: 
Richtárová, Staré Hory, Banská Bystrica County, Banská Bystrica Region, Slovakia (Slovak Republic)
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.3 × 4.2 × 4 cm
Description

Blue tabular posnjakite crystals on matrix. Ponsjakite is a secondary copper mineral and is quite scarce at the locality.

Mineral Data
What's on the rock

Posnjakite

Formula: 
Cu4(SO4)(OH)6·H2O
Strunz: 
7.DD.10
Crystal System: 
Monoclinic
Hardness: 
2.0 - 3.0
Type Locality: 
Nura-Taldy W deposit, Karagandy Province (Qaragandy Oblysy; Karaganda Oblast'), Kazakhstan...