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Kidwellite Natrodufrénite

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PAV1074702

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Description
Locality: 
Fragas da Carvalhosa Mine, Felgar, Torre de Moncorvo, Bragança District, Portugal
Class: 
Crystal Group/Cluster
Size Range: 
Thumbnail (1-3cm)
Size: 
0.4 × 2.6 × 1.5 cm
Description

Greenish brown natrodufrénite with minute epitaxial growth of kidwellite on the extremities (typical in this locality).

Collected: 
2023
Boxed with Label
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

Natrodufrénite

Formula: 
NaFe2+Fe3+5(PO4)4(OH)6·2H2O
Strunz: 
8.DK.15
Hardness: 
3.5 - 4.5
Type Locality: 
Pluherlin Castle, Rochefort-en-Terre, Morbihan, Brittany, France

Current price

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15
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Start 05 Oct 18:00
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Shipping Information

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Europe
8
Rest of World
10

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