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Gismondine Phillipsite & Analcime

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NST696738

Gismondine Phillipsite & Analcime

Description Tabs

Description
Locality: 
Gaulsberg Quarry, Ortenberg, Wetterau, Darmstadt, Hesse, Germany
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.7 × 2.5 × 2 cm
Description

Serveral sharp, white Gismondine crystals showing small subindividuals. The Gismondines sit on cross-twinned, transparent Phillipsites in an Analcime-coated basaltic vug from Gaulsberg quarry. Collected in 2003. The quarry has been closed 1. 1. 2010. It is completely fenced-in and a natural reserve for the Eagle Owl..

Mineral Data
What's on the rock

Gismondine

Synonym Of: 

Gismondine-Ca

Formula: 
CaAl2Si2O8·4H2O
Strunz: 
9.GC.05
Hardness: 
0.0
Group Parent: 
Zeolite Group

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

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