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Barbosalite & Hureaulite

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RSL549427

Barbosalite & Hureaulite

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Description Tabs

Description
Locality: 
Lavra do Tomé, Conselheiro Pena, Minas Gerais, Brazil
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
1.6 × 0.8 × 0.9 cm
Description

Pseudocubic deep black barbosalite crystals, very brilliant, interpenetrated (probably twinned) on orange-brown hureaulite. This member of the lazulite group shows defined idiomorphic crystals as shown in SEM photo. Very rare and consistent with analysis.

Mineral Data
What's on the rock

Barbosalite

Formula: 
Fe2+Fe3+2(PO4)2(OH)2
Strunz: 
8.BB.40
Crystal System: 
Monoclinic
Hardness: 
5.5 - 6.0
Type Locality: 
Sapucaia Mine (Proberil mine), Sapucaia do Norte, Galiléia, Doce valley, Minas Gerais, Brazil

Hureaulite

Formula: 
(Mn,Fe)5(PO4)2(HPO4)2·4H2O
Strunz: 
8.CB.10
Hardness: 
5.0
Type Locality: 
Les Hureaux, Saint-Sylvestre, Haute-Vienne, Limousin, France
Analysis
Analysis Report - only: Barbosalite & Hureaulite
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