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Jørgensenite

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GFM1000971

Jørgensenite

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Description Tabs

Description
Locality: 
Ivigtut, Ivittuut, Arsuk Fjord, Sermersooq, Greenland
Class: 
Crystal Group/Cluster
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4 × 2 × 2.5 cm
Description

The rare strontium fluoride previously known only from Ivigtut, forms several centimeters large white massive microcrystalline aggregates of long prismatic around 100μm large crystals. Always together with Weberite, Thomsenolite and Topas.

Mineral Data
What's on the rock

Jørgensenite

Formula: 
Na2(Sr,Ba)14Na2Al12F64(OH,F)4
Strunz: 
3.CC.20
Crystal System: 
Monoclinic
Hardness: 
3.5 - 4.0
Streak: 
White
Type Locality: 
Ivigtut Cryolite deposit, Ivittuut (Ivigtut), Arsuk Fjord, Sermersooq, Greenland