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Thomsonite

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PDM625275

Thomsonite

Description Tabs

Description
Locality: 
Reydarfjördur, Eastern Region, Iceland
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.3 × 4.1 × 2.3 cm
Description

Rounded radiated aggregatesd of white fibrous thomsonite crystals that coalesce to cover completely the cavity in the volcanic matrix rock. Scarce material from Iceland.

Specimen obtained in 1994 by Raymond Bastiaens (BE).

Mineral Data
What's on the rock

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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