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Barbosalite Hureaulite & Kidwellite

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SER842527

Barbosalite Hureaulite & Kidwellite

Description Tabs

Description
Locality: 
Sandamap Pegmatite, Sandamap North Farm 115, Dâures, Erongo Region, Namibia
Class: 
Crystal Group/Cluster
Size Range: 
Thumbnail (1-3cm)
Size: 
1.9 × 1.6 × 1.3 cm
Description

black blocky barbosalite crystals with pink hureaulite and green tufts of kidwellite

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

Kidwellite

Formula: 
NaFe3+9(PO4)6(OH)11·3H2O
Strunz: 
8.DK.20
Hardness: 
3.0
Streak: 
yellow
Type Locality: 
Fodderstack Mountain, Norman, Montgomery Co., Arkansas, USA