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Naujakasite & Villiaumite & Arfvedsonite

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SHS975434

Naujakasite & Villiaumite & Arfvedsonite

Description Tabs

Description
Locality: 
Kvanefjeld, Ilímaussaq, Narsaq, Kujalleq, Greenland
Class: 
Massive/Crystalline
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4 × 2.2 × 1.6 cm
Description

Naujakasite with villiaumite and arfvedsonite in matrix

Mineral Data
What's on the rock

Naujakasite

Formula: 
(Na,K)6(Fe2+,Mn2+,Ca)(Al,Fe)4Si8O26
Strunz: 
9.EG.10
Hardness: 
2.0 - 3.0
Type Locality: 
Naujakasik (Naajakasik), Tunulliarfik Fjord (Tunugdliarfik), Ilímaussaq complex, Narsaq, Kujalleq, Greenland

Villiaumite

Formula: 
NaF
Strunz: 
3.AA.20
Crystal System: 
Isometric
Hardness: 
2.0 - 2.5
Streak: 
White
Type Locality: 
Rouma Island (Roume Island; Roma Island; Ruma Island), Los Archipelago (Los Islands), Guinea

Arfvedsonite

Formula: 
[Na][Na2][Fe2+4Fe3+]Si8O22(OH)2
Strunz: 
9.DE.25
Hardness: 
5.0 - 6.0
Type Locality: 
Kangerluarsuk Fjord (Kangerdluarssuq Fjord), Ilímaussaq complex, Narsaq, Kujalleq, Greenland