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Heulandite

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CAM204291

Heulandite

Ex Hans-Jürgen Wilke collection

Description Tabs

Description
Locality: 
Berufjörður, Djúpavogshreppur, Eastern Region, Iceland
Size Range: 
Cabinet (10-18 cm)
Size: 
12 × 7.8 × 4.5 cm
Largest Crystal: 
3.50cm
Description

A rich coverage of colourless heulandite crystals up to 3.5 cm and white apophyllite crystals up to 7 mm on matrix.

Mineral Data
What's on the rock

Heulandite

Synonym Of: 

Heulandite-Ba

Formula: 
(Ba,Ca,K,Na,Sr)5Al9Si27O72·22H2O
Strunz: 
9.GE.05
Hardness: 
3.5

Heulandite-Ca

Formula: 
(Ca,Na)2-3Al3(Al,Si)2Si13O36·12H2O
Strunz: 
9.GE.05
Hardness: 
3.5 - 4.0

Heulandite-K

Formula: 
(K,Na,Ca)2-3Al3(Al,Si)2Si13O36·12H2O
Strunz: 
9.GE.05
Hardness: 
3.0 - 3.5

Heulandite-Na

Formula: 
(Na,Ca)2-3Al3(Al,Si)2Si13O36·12H2O
Strunz: 
9.GE.05
Hardness: 
3.0 - 3.5

Heulandite-Sr

Formula: 
(Sr,Na,Ca)2-3Al3(Al,Si)2Si13O36·12H2O
Strunz: 
9.GE.05
Hardness: 
3.0 - 3.5
Hardness: 
3 - 3.5
Colour: 
White
Streak: 
White
Cartils Minerals

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