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Kidwellite & Hureaulite

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SER870649

Kidwellite & Hureaulite

Description Tabs

Description
Locality: 
Serra Branca Pegmatite, Pedra Lavrada, Borborema Province, Paraiba, Brazil
Class: 
Crystal Group/Cluster
Size Range: 
Thumbnail (1-3cm)
Size: 
2.1 × 1.8 × 1.8 cm
Description

some colourless hureaulite crystals covered by green tufts of kidwellite ; self collected on 2016

Mineral Data
What's on the rock

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

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