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Köttigite & Ferrilotharmeyerite

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JYJ906408

Köttigite & Ferrilotharmeyerite

Description Tabs

Description
Locality: 
Tsumeb Mine, Otavi Highlands, Namibia
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.4 × 2.5 × 1.9 cm
Description

Colourless to pale blue köttigite with green ferrilotharmeyerite on chalcocite-germanite matrix. ger5 SEM-EDS & SXRD confirmed. 

Comes with a colour printed analysis. 

 

Mineral Data
What's on the rock

Köttigite

Formula: 
Zn3(AsO4)2·8H2O
Strunz: 
8.CE.40
Crystal System: 
Monoclinic Prismatic crystals or crusts
Hardness: 
2.5 - 3.0
Type Locality: 
Daniel Mine (St. Daniel Mine), Neustädtel, Schneeberg District, Erzgebirge, Saxony, Germany

Ferrilotharmeyerite

Formula: 
Ca(Fe3+,Zn)2(AsO4)2·2(OH,H2O)
Strunz: 
8.CG.15
Crystal System: 
Monoclinic
Hardness: 
3.0
Type Locality: 
Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto Region (Oshikoto), Namibia