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Allanite-(Ce) & Dissakisite-(Ce)

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SMM678789

Allanite-(Ce) & Dissakisite-(Ce)

Classic Locality

Description Tabs

Description
Locality: 
Trimouns, Luzenac, Ariège, Occitanie, France
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
6 × 5 × 4 cm
Weight: 
260.00gr
Description

A lot of crystals of allanite-(Ce)/dissakisite-(Ce) scattered on a portion of the dolomite matrix and with some nice small calcite crystals. It is impossible to count them, interesting specimen from the classic French locality.

Boxed with Label
Mineral Data
What's on the rock

Allanite-(Ce)

Formula: 
{CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Strunz: 
9.BG.05b
Crystal System: 
Monoclinic
Hardness: 
5.5 - 6.0
Type Locality: 
Qáqarssuatsiaq, Aluk Island, Kap Farvel, Kujalleq, Greenland

Dissakisite-(Ce)

Formula: 
{CaCe}{Al2Mg}(Si2O7)(SiO4)O(OH)
Strunz: 
9.BG.05b
Hardness: 
6.5 - 7.0
Type Locality: 
Balchen Mt, Sør Rondane Mts, Queen Maud Land (Dronning Maud Land), Eastern Antarctica, Antarctica

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