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Thomsenolite

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WND583214

Thomsenolite

Rare Mineral

Description Tabs

Description
Locality: 
Ivigtut, Ivittuut, Arsuk Fjord, Sermersooq, Greenland
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
7 × 5.3 × 5.5 cm
Largest Crystal: 
1.30cm
Description

This fantastic specimen features lanceolate crystals of rare mineral thomsenolite up to fabulous 1.3 cm in lenght. The are showing a beautiful horizontal striation and the crystals are mostly undamaged. An extraordinary specimen in excellent shape. Nearly impossible to purchase such good stuff nowadays.

Mineral Data
What's on the rock

Thomsenolite

Formula: 
NaCa[AlF6] · H2O
Strunz: 
3/C.02-20
Crystal System: 
Monoclinic
Hardness: 
2
Colour: 
Colourless, white, pale
Streak: 
White
Type Locality: 
Ivigtut Cryolite deposit, Ivittuut (Ivigtut), Arsuk Fjord, Sermersooq, Greenland
Dimorph Of: 

Pachnolite

Formula: 
NaCa[AlF6]·H2O
Strunz: 
3.CB.40
Hardness: 
3.0
Wendel Minerals

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