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Analcime Siderite & Thorbastnäsite

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CFL1037394

Analcime Siderite & Thorbastnäsite

Description Tabs

Description
Locality: 
Poudrette Quarry, Mont Saint-Hilaire, Québec, Canada
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
8.5 × 6 × 6 cm
Description

Unique specimen of analcime crystals associated with thorbastnasite, siderite, albite, brookite, synchysite-(Ce), calcite and microcline.  The uniqueness of this specimen comes from the mesh of thorbastnasite microcrystals covering some of the large crystals (analcime, microcline).  Notice also the second generation of gemmy analcime microcrystals.

Mineral Data
What's on the rock

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

Siderite

Formula: 
FeCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.5 - 4.5
Streak: 
White

Thorbastnäsite

Formula: 
Th(Ca,Ce)(CO3)2F2·3H2O
Strunz: 
5.BD.20a
Hardness: 
4.0 - 4.5
Colour: 
Brown
Type Locality: 
Pichikhol' alkaline Massif, Balygtyg-Khem River, Sangilen Upland, Tuva Republic, Eastern-Siberian Region, Russia...

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