Moving mountains for you
Switch currency

Current Live Auctions

Current Live Fixed Price Sales

Natrodufrénite Kidwellite & Wardite

Views:
Watches:
PAV961995

Natrodufrénite Kidwellite & Wardite

New Discovery

Description Tabs

Description
Locality: 
Fragas da Carvalhosa Mine, Felgar, Torre de Moncorvo, Bragança District, Portugal
Class: 
Crystal Group/Cluster
Size Range: 
Small miniature (3-4.5 cm)
Size: 
1.6 × 3.6 × 1.8 cm
Description

Deep green natrodufrénite with minute epitaxial growth of kidwellite on the extremities (typical in this locality). In some areas we can see circular clusters with bands in which the two minerals alternate.
Some tiny wardite crystals are also present.
PXRD and EDS analyzed.

Collected: 
2019
Boxed with Label
Mineral Data
What's on the rock

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

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

Wardite

Formula: 
NaAl3(PO4)2(OH)4·2H2O
Strunz: 
8.DL.10
Hardness: 
5.0
Type Locality: 
Clay Canyon, Fairfield, Oquirrh Mts, Utah Co., Utah, USA