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Niobophyllite Aegirine & Feldspar

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RSL569562

Niobophyllite Aegirine & Feldspar

Analysed

Description Tabs

Description
Locality: 
Mount Malosa, Zomba, Southern Region, Malawi
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.9 × 1.8 × 1.7 cm
Largest Crystal: 
0.70cm
Description

Nice specimen of niobophyllite formed by some laminar flattened brilliant crystals, with a rusty orange color. They're accompanied by developed and defined deep green aegirine crystals, very aerial disposed on a fledspar matrix. Niobophyllite is a titanium and niobium-containing fluorosilicate, nicely complex.

Mineral Data
What's on the rock

Niobophyllite

Formula: 
(K,Na)3(Fe,Mn)6(Nb,Ti)2Si8(O,OH,F)31
Strunz: 
9.DC.05
Hardness: 
3.0 - 4.0
Type Locality: 
Mann 2 (Ten Mile Lake), Seal Lake alkaline complex (Letitia Lake), Labrador, Newfoundland and Labrador, Canada

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

Feldspar

Group Parent: 
Feldspar Group
Analysis
Analysis Report - only: Niobophyllite Aegirine & Feldspar