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Montmorillonite Phillipsite & Motukoreaite

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POL873066

Montmorillonite Phillipsite & Motukoreaite

Description Tabs

Description
Locality: 
Stradner Kogel, Wilhelmsdorf, Südoststeiermark District, Styria, Austria
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
1.9 × 1.7 × 0.8 cm
Description

Very nice speciemn of greyish Montmorillonite agragates on colorless, lustrous Phillipsite and white to pale blueish, very rare (!) massive Motukoreaite on matrix.

Mineral Data
What's on the rock

Montmorillonite

Formula: 
(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2·nH2O
Strunz: 
9.EC.40
Hardness: 
1.0 - 2.0
Streak: 
white
Type Locality: 
Montmorillon, Vienne, Poitou-Charentes, France

Phillipsite

Synonym Of: 

Phillipsite-Ca

Formula: 
(Ca0.5,K,Na,Ba0.5)4-7[Al4-7Si12-9O32 . 12H2O
Strunz: 
9.GC.10
Hardness: 
4.0 - 5.0

Phillipsite-K

Formula: 
(K,Na,Ca0.5,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
Strunz: 
9.GC.10
Hardness: 
4.0 - 5.0

Phillipsite-Na

Formula: 
(Na,K,Ca0.5,Ba0.5)4-7[Al4-7Si12-9O32]·12H2O
Strunz: 
9.GC.10
Hardness: 
4.0 - 5.0
Group Parent: 
Zeolite Group

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