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Monteregianite & Calcioancylite-(Ce)

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CFL802794

Monteregianite & Calcioancylite-(Ce)

Type Locality

Description Tabs

Description
Locality: 
Poudrette Quarry, Mont Saint-Hilaire, Québec, Canada
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
7 × 5 × 3 cm
Description

Classic type locality specimen of monteregianite-(Y) crystals associated with calcioancylite-(Ce), biotite and fluorite.  The specimen is rich in calcioancylite-(Ce).  The Poudrette Quarry is the only locality where monteregianite-(Y) is found.  Collected by Gilles Haineault.

Mineral Data
What's on the rock

Monteregianite

Synonym Of: 

Monteregianite-(Y)

Formula: 
(Na,K)6(Y,Ca)2Si16O38·10H2O
Strunz: 
9.EB.15
Hardness: 
3.5

Calcioancylite-(Ce)

Formula: 
(Ca,Sr)Ce(CO3)2(OH)·H2O
Strunz: 
5.DC.05
Crystal System: 
Orthorhombic
Hardness: 
4.0 - 4.5

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