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Thorite Yttrofluorite & Biotite

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POL838207

Thorite Yttrofluorite & Biotite

Description Tabs

Description
Locality: 
Keivy Mountains, Murmansk Oblast, Russian Federation
Class: 
Massive/Crystalline
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.3 × 2.7 × 1.3 cm
Description

Interesting specimen of orange-red Thorite with Yttrofluorite on matrix of Biotite mica from classic locality.

Mineral Data
What's on the rock

Thorite

Formula: 
(Th,U)SiO4
Strunz: 
9.AD.30
Crystal System: 
Tetragonal
Hardness: 
4.5
Type Locality: 
The Thorite Hole, Løvøya (Løvø; Lövö; Lövöe), Langesundsfjorden, Porsgrunn, Telemark, Norway

Yttrofluorite

Variety Of: 

Fluorite

Formula: 
CaF2
Strunz: 
3.AB.25
Hardness: 
4.0
Formula: 
(Ca1-xYx)F2+x where 0.05< x <0.3
Hardness: 
0.0

Biotite

Group Parent: 
Mica Group

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