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Pachnolite & Thomsenolite

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MNT614823

Pachnolite & Thomsenolite

ex Dr. F. Krantz, Bonn, GER
Type Locality

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Description Tabs

Description
Locality: 
Ivigtut, Ivittuut, Arsuk Fjord, Sermersooq, Greenland
Class: 
Massive/Crystalline
Size Range: 
Cabinet (10-18 cm)
Size: 
10 × 8 × 3.5 cm
Description

Despite the accompanying label "Ralstonite" this specimen consists mostly of thomsenolite and (partly epitaxial) pachnolite - all being type locality minerals from this classic and defunct location. I may have spotted some octahedral hydrokenoralstonite with the 10x lens but i am not really sure. So this specimen will be listed as Thomsenolite/Pachnolite. Ex Krantz, Bonn, GER.

Mineral Data
What's on the rock

Pachnolite

Formula: 
NaCa[AlF6]·H2O
Strunz: 
3.CB.40
Hardness: 
3.0
Streak: 
White
Type Locality: 
Ivigtut Cryolite deposit, Ivittuut (Ivigtut), Arsuk Fjord, Sermersooq, Greenland

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

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Thank you for your interest in my offers! Payment is possible via Paypal, bank transfer or cash if you pick up the item(s) personally. Bank data will be provided after settling the auction/transaction(s) if needed.

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Best regards Roger

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