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Hellandite-(Y)

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SHS20197

Hellandite-(Y)

Ex Dr F Krantz (Bonn, Germany)

Description Tabs

Description
Locality: 
Kragerø, Vestfold og Telemark, Norway
Size Range: 
Small cabinet (7-10 cm)
Size: 
8.7 × 5.7 × 5.4 cm
Largest Crystal: 
2.00cm
Description

A big REPAIRED hellandite-(Y) crystal with gadolinite-(Y) on feldspar and quartz.

Mineral Data
What's on the rock

Hellandite-(Y)

Formula: 
(Ca,REE)4Y2Al(Be,Li)2-xB4Si4O22(OH)2
Strunz: 
9.DK.20
Crystal System: 
Monoclinic
Hardness: 
5.5
Type Locality: 
Lindvikskollen quarry, Lindvikskollen-Kalstadgangen pegmatite, Kragerø, Telemark, Norway