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Yttrotantalite-(Y) & Gadolinite

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RSG942037

Yttrotantalite-(Y) & Gadolinite

Rare Mineral

Description Tabs

Description
Locality: 
Ytterby, Resarö, Vaxholm, Stockholm County, Sweden
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
0.5 × 1.3 × 1 cm
Description

This sample was first labelled Yttrotantalite but according to an expert it is more likely to be the Gadolinite-Y due to its flat crystal structure.

In a box 2.8x2.8cm, labelled

FoV : 3.8mm

Mineral Data
What's on the rock

Yttrotantalite-(Y)

Formula: 
(Y,Ca,U4+,Fe2+)2(Ta,Nb)2O8
Strunz: 
4.DG.10
Hardness: 
5.0 - 5.5
Streak: 
Grey
Type Locality: 
Ytterby, Resarö, Vaxholm, Uppland, Sweden

Gadolinite

Synonym Of: 

Gadolinite-(Ce)

Formula: 
(Ce,La,Nd,Y)2Fe2+Be2Si2O10
Strunz: 
9.AJ.20
Hardness: 
6.5 - 7.0

Gadolinite-(Y)

Formula: 
Y2Fe2+Be2Si2O10
Strunz: 
9.AJ.20
Hardness: 
6.5 - 7.0

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