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Cyrilovite & Dufrénite

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SHS100450

Cyrilovite & Dufrénite

Description Tabs

Description
Locality: 
Gunheath Pit, St Austell, Cornwall, United Kingdom
Size Range: 
Small cabinet (7-10 cm)
Size: 
9.5 × 6.2 × 2.6 cm
Description

Cyrilovite and dufrenite in matrix

Mineral Data
What's on the rock

Cyrilovite

Formula: 
NaFe3+3(PO4)2(OH)4·2H2O
Strunz: 
8.DL.10
Crystal System: 
Tetragonal
Hardness: 
4.0
Streak: 
Yellow
Type Locality: 
Cyrilov phosphate pegmatite (Cyrillhof), Velké Meziříčí, Vysočina Region, Moravia (Mähren; Maehren), Czech Republic

Dufrénite

Formula: 
Ca0.5Fe2+Fe3+5(PO4)4(OH)6·2H2O
Strunz: 
8.DK.15
Hardness: 
3.5 - 4.5
Streak: 
Green
Type Locality: 
Anglar, Haute-Vienne, Limousin, France
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