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Fluorcalciopyrochlore & Britholite-(Ce)

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ZLT829571

Fluorcalciopyrochlore & Britholite-(Ce)

Description Tabs

Description
Locality: 
In den Dellen Quarries, Niedermendig, Mendig, Mayen-Koblenz, Rhineland-Palatinate, Germany
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
0.5 × 2 × 1 cm
Description

View in a vug of an small fraction of an sanidinite ejection block with a orange octahedron of fluorcalciopyrochlore growing on a long prismatic, colorless crystal of britholite-(Ce). (FOV 1.7 mm)

Mineral Data
What's on the rock

Fluorcalciopyrochlore

Formula: 
(Ca,Na)2(Nb, Ti)2O6F
Hardness: 
0.0
Type Locality: 
Bayan Obo deposit (Bayun-Obo deposit; Baiyunebo deposit), Bayan Obo, Bayan Obo Mining District, Baotou League (Baotou Prefecture), Inner Mongolia Autonomous Region, China

Britholite-(Ce)

Formula: 
Ca2(Ce,Ca)3(SiO4,PO4)3(OH,F)
Strunz: 
9.AH.25
Crystal System: 
Hexagonal
Hardness: 
5.5
Type Locality: 
Naujakasik (Naajakasik), Tunulliarfik Fjord (Tunugdliarfik), Ilímaussaq complex, Narsaq, Kujalleq, Greenland

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