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Nadorite & Valentinite

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PDM865878

Nadorite & Valentinite

Type Locality

Description Tabs

Description
Locality: 
Nador n'Bails Mine, Djebel Nador, Guelma District, Guelma Province, Algeria
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
1.9 × 1.6 × 1.1 cm
Description

From the type locality, this is a rich aggregate of lenticular nadorite crystals of brown colour and good lustre. There are associated some nice radially aggregated crystals of valentinite of white colour. An old representative specimen of this uncommon lead-antimony-oxychloride. These crystals appeared in a central part of a lens at the Nador N'Bails mine, and by 1930 they were completely mined out.

Ex Francis Hubert #10424.

Mineral Data
What's on the rock

Nadorite

Formula: 
PbSbClO2
Strunz: 
3.DC.30
Crystal System: 
Orthorhombic
Hardness: 
3.5 - 4.0
Type Locality: 
Nador n'Bails Mine, Djebel Nador, Guelma, Constantine Province, Algeria...

Valentinite

Formula: 
Sb2O3
Strunz: 
4.CB.55
Hardness: 
2.5 - 3.0
Streak: 
White
Type Locality: 
Les Chalanches Mine, Allemont, Isère, Rhône-Alpes, France

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