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Prosopite & Thomsenolite

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HCH547354

Prosopite & Thomsenolite

ex Hans Holtkamp collection, Solingen, Germany

Description Tabs

Description
Locality: 
Ivigtut, Ivittuut, Arsuk Fjord, Sermersooq, Greenland
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.5 × 3 × 3 cm
Largest Crystal: 
0.20cm
Description

Colourless crystals of Prosopite and Thomsenolithe up to 2 mm large are sitting on matrix.

Mineral Data
What's on the rock

Prosopite

Formula: 
CaAl2(F,OH)8
Strunz: 
3.CD.10
Crystal System: 
Monoclinic
Hardness: 
4.5
Type Locality: 
Tin mine, Altenberg, Erzgebirge, Saxony, Germany

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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