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Aegirine

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MCH865257

Aegirine

Type Locality

Description Tabs

Description
Locality: 
Rundemyr, Øvre Eiker, Viken, Norway
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.5 × 3 × 2.7 cm
Largest Crystal: 
1.90cm
Description

A 1.9 cm brownish, very well terminated aegirine crystal (= acmite) embedded in quartz from its type locality.

Aegirine was first described as acmit by P. H. Ström (1821). Later, in 1834, Hans Morten Thrane Esmark found a new mineral on Låven, Langesundsfjorden, which was given the name aegirine. In 1871 G. Tschermak showed that acmite and aegirine are the same mineral.

Mineral Data
What's on the rock

Aegirine

Formula: 
NaFe3+Si2O6
Group Parent: 
Clinopyroxene Subgroup
Strunz: 
9.DA.25
Crystal System: 
Monoclinic
Hardness: 
6.0
Type Locality: 
Rundemyr, Øvre Eiker, Buskerud, Norway

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