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Niobophyllite & Quartz On Orthoclase

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SLN754075

Niobophyllite & Quartz On Orthoclase

Description Tabs

Description
Locality: 
Mount Malosa, Zomba, Southern Region, Malawi
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
6.1 × 9 × 6.2 cm
Largest Crystal: 
4.60cm
Weight: 
195.00gr
Description

Interesting specimen from Mount Malosa of rare Niobophyllite in nut-brown lamellar crystals associated with Quartz on crystallized creamy white Ortochlase. The biggest Ortochlase crystal measures 4.6 X 3.8 Cm

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

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Crystal System: 
Trigonal
Hardness: 
7.0
Streak: 
White

Orthoclase

Formula: 
KAlSi3O8
Strunz: 
9.FA.30
Hardness: 
6.0
Streak: 
White

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