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Analcime Chabazite-Ca & Thomsonite

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ZLT155059

Analcime Chabazite-Ca & Thomsonite

Description Tabs

Description
Locality: 
Ljósá, Eysturoy Island, Faroe Islands, Denmark
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.3 × 4.6 × 2.8 cm
Largest Crystal: 
1.30cm
Description

This is a very unusual zeolite specimen. Crystals all around are Analcime and Chabazite with yellow-brown micro crystals of Thomsonite-Ca filling partly the gaps between the crystals. Collected from road cut near Ljosa in 1975.

Mineral Data
What's on the rock

Analcime

Formula: 
Na2(Al2Si4O12)·2H2O
Strunz: 
9.GB.05
Crystal System: 
Triclinic
Hardness: 
5.0 - 5.5
Streak: 
White
Type Locality: 
Cyclopean Islands, Acitrezza (Aci Trezza), Etna Volcanic Complex, Catania Province, Sicily, Italy

Chabazite-Ca

Formula: 
(Ca,K2,Na2)2[Al2Si4O12]2·12H2O
Strunz: 
9.GD.10
Hardness: 
4.0 - 5.0
Streak: 
White
Type Locality: 
Colle del Lares, San Nicolò Valley, Buffaure Group, Fassa Valley, Trento Province, Trentino-Alto Adige, Italy

Thomsonite

Synonym Of: 

Thomsonite-Ca

Formula: 
NaCa2[Al5Si5O20]·6H2O
Strunz: 
9.GA.10
Hardness: 
5.0 - 5.5

Thomsonite-Sr

Formula: 
Na(Sr,Ca)2[Al5Si5O20]·7H2O
Strunz: 
9.GA.10
Hardness: 
5.0 - 0.0

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