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Phillipsite Na

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MNT168318

Phillipsite Na

ex Dr. F. Krantz (GER), ex?
Classic Locality

Description Tabs

Description
Locality: 
Aci Castello, Etna, Catania Province, Sicily, Italy
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.5 × 4.8 × 4 cm
Description

Italian classic from Aci Castello: labeled to be gismondine the specimen exhibits whieish spherical aggragtes of a zeolite on an volcanic host rock matrix. I would tend to (visually from similarity)  ID it as philipsite-Na which would be the type locality and occurs there in very similar specimens. Did not analyse. A nice specimen though. Old italian label, collector unknown, Krantz stock.

Mineral Data
What's on the rock

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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Best regards Roger