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Tacharanite On Phillipsite

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PDM845519

Tacharanite On Phillipsite

Description Tabs

Description
Locality: 
Espalion, Aveyron, Occitanie, France
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.6 × 6.2 × 3.6 cm
Weight: 
161.00gr
Description

Dull white spheroidal aggregates of tacharanite to 7 mm, on a volcanic cavity rock that is richly coated by tiny lustrous phillipsite crystals. A good representative specimen from Espalion.

Acquired in 1993. Ex Bob Janssens #1962.

Mineral Data
What's on the rock

Tacharanite

Formula: 
Ca12Al2Si18O51·18H2O
Strunz: 
9.HA.75
Crystal System: 
Monoclinic
Hardness: 
5.0
Colour: 
White
Type Locality: 
Portree, Trotternish, Isle of Skye, North West Highlands (Inverness-shire), Scotland, UK

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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