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Keiviite-(Y)

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SKY1160579

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Description
Locality: 
Ytterby, Resarö, Vaxholm, Stockholm County, Sweden
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.5 × 2.5 × 2 cm
Description

White aggregates of keiviite-(Y) from the famous locality of Ytterby known for the discovery of four rare earth chemical elements(Y, Er, Tb, Yb).

Ex Vandenbroucke Museum collection from Waregem, Belgium.

Mineral Data
What's on the rock

Keiviite-(Y)

Formula: 
(Y,Yb)2[Si2O7]
Strunz: 
9.BC.05
Hardness: 
4.0 - 5.0
Type Locality: 
Ploskaya Mt, Western Keivy Massif, Keivy Mountains, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia...

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