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Engelhauptite

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JYJ602233

Engelhauptite

Description Tabs

Description
Locality: 
Kahlenberg, Oberstadtfeld, Daun, Vulkaneifel, Rhineland-Palatinate, Germany
Class: 
Crystals on Matrix
Size Range: 
Micromount (under 1cm)
Size: 
0.8 × 0.6 × 0.4 cm
Description

Extremely rare greenish-yellow engelhauptite, previously in the collection of W. Schüller, a specialist for minerals from the Eifel mts. 

This mineral was found only very limited and structure could be solved. 

It is not only interesting as it is a new mineral (IMA 2013-09), as it is also a  spin liquid candidate, with novel physical properties at low temperatures,  as the related vesignieite is. 

 

Mineral Data
What's on the rock

Engelhauptite

Formula: 
KCu3(V2O7)(OH)2Cl
Hardness: 
0.0
Type Locality: 
Kahlenberg (Auf'm Kopp), Oberstadtfeld, Daun, Eifel, Rhineland-Palatinate, Germany...