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Kentbrooksite

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CFL1079394

Kentbrooksite

Description Tabs

Description
Locality: 
Poudrette Quarry, Mont Saint-Hilaire, Québec, Canada
Class: 
Single Crystal
Size Range: 
Thumbnail (1-3cm)
Size: 
1.7 × 1.6 × 1.4 cm
Description

Exceptional specimen of a complete crude kentbrooksite crystal associated with aegirine.  Collected by Gilles Haineault in 2003.  Ex-Gilles Haineault collection specimen.

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

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