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Ralstonite

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MCH182760

Ralstonite

Description Tabs

Description
Locality: 
Gjerdingselva, Nordmarka, Lunner, Viken, Norway
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4 × 2.3 × 1.8 cm
Description

A 2 mm vug in ekerite rock is filled with an aggregate of several 0.1-0.2 mm sized white/(beige) coloured ralstonite crystals.

Mineral Data
What's on the rock

Hydrokenoralstonite

Formula: 
NaMg[Al(F,OH)6]·H2O
Group Parent: 
Pyrochlore Supergroup
Strunz: 
3/C.03-60
Crystal System: 
Isometric
Hardness: 
4.5
Colour: 
Colourless, white
Streak: 
White
Type Locality: 
Ivigtut Cryolite deposit, Ivittuut (Ivigtut), Arsuk Fjord, Sermersooq, Greenland

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