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Birnessite & Natrolite On Polylithionite

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SHS923488

Birnessite & Natrolite On Polylithionite

Description Tabs

Description
Locality: 
Mont Saint-Hilaire, Montérégie, Québec, Canada
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
1.6 × 1.4 × 0.8 cm
Description

Nice birnessite and natrolite on polylithionite

Mineral Data
What's on the rock

Birnessite

Formula: 
(Na,Ca)0.5(Mn4+,Mn3+)2O4·1.5H2O
Strunz: 
4.FL.45
Crystal System: 
Orthorhombic
Hardness: 
1.5
Type Locality: 
Birness, Ellon, Buchan Grampian (Aberdeenshire), Scotland, UK

Natrolite

Formula: 
Na2Al2Si3O10·2H2O
Strunz: 
9.GA.05
Hardness: 
5.0 - 5.5
Streak: 
White
Type Locality: 
Hohentwiel, Singen, Hegau, Baden-Württemberg, Germany

Polylithionite

Formula: 
KLi2Al(Si4O10)(F,OH)2
Strunz: 
9.EC.20
Hardness: 
2.0 - 3.0
Type Locality: 
Kangerluarsuk Fjord (Kangerdluarssuq Fjord), Ilímaussaq complex, Narsaq, Kujalleq, Greenland