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Herzenbergite & Varlamoffite

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JYJ750140

Herzenbergite & Varlamoffite

19-11-08-bol7 EDS conf. specimen

Description Tabs

Description
Locality: 
Carguaicollo Mine, Quijarro Province, Potosi Department, Bolivia
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.4 × 3.5 × 2.2 cm
Description

19-11-08-bol7 EDS conf. specimen hosting grey metallic herzenbergite that has altered to yellow varlamoffite. 

Herzenbergite-teallite forms a series and herzenbergite is the Sn dominant end member. The formula for herzenbergite is (Sn,Pb)SnS2, while some Pb is replacing some Sn. 

A fresh broken crystal was examined. 

Mineral Data
What's on the rock

Herzenbergite

Formula: 
(Sn,Pb)SnS2
Strunz: 
2.CD.05
Crystal System: 
Orthorhombic
Hardness: 
2.0
Type Locality: 
Maria-Teresa Mine, Huari, Avaroa Province, Oruro Department, Bolivia

Varlamoffite

Formula: 
(Sn,Fe)(O,OH)2
Strunz: 
4.DB.05
Hardness: 
6 - 6.5
Colour: 
Yellow
Streak: 
Light Yellow
Type Locality: 
Kalima, Maniema, Democratic Republic of Congo (Zaïre)
Analysis
Analysis Report - only: Herzenbergite & Varlamoffite
Analysis Report - only: Herzenbergite & Varlamoffite