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Kentbrooksite & Microcline

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CSL136792

Kentbrooksite & Microcline

Classic Locality

Description Tabs

Description
Locality: 
Mont Saint-Hilaire, Montérégie, Québec, Canada
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.2 × 3.8 × 2.1 cm
Description

Rare eudialyte group mineral kentbrooksite on microcline matrix. There's a complete crystal sitting in a small cavity covered by white alteration product. All the other crystals are fragmented.

Mineral Data
What's on the rock

Kentbrooksite

Formula: 
(Na,REE)15(Ca,REE)6(Mn2+,Fe2+)3Zr3Nb[Si25O74]F2·2H2O
Strunz: 
9.CO.10
Crystal System: 
Trigonal
Hardness: 
5.0 - 6.0
Streak: 
White.
Type Locality: 
Kentbrooksite occurrence, Amdrup Firth, Kangerlussuaq Firth, Tunu Province (East Greenland), Greenland

Microcline

Formula: 
KAlSi3O8
Strunz: 
9.FA.30
Crystal System: 
Triclinic - Pinacoidal
Hardness: 
6.0 - 6.5
Streak: 
White
Type Locality: 
Arendal, Aust-Agder, Norway
Loranth Minerals

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