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Niobophyllite & K Feldspar

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VCV147782

Niobophyllite & K Feldspar

Description Tabs

Description
Locality: 
Mount Malosa, Zomba, Southern Region, Malawi
Size Range: 
Thumbnail (1-3cm)
Size: 
2.5 × 2.1 × 2 cm
Largest Crystal: 
1.60cm
Description

Exceptional and beautiful specimen of rare niobophyllite from Malawi's Chilwa Alkaline Deposit. Amazing bronze iridescence on the foliated crystals.

Named for its Nb content and phyllos, Greek for leaf, in allusion to its foliated habit.

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

K Feldspar

Synonym Of: 

Microcline

Formula: 
KAlSi3O8
Strunz: 
9.FA.30
Hardness: 
6.0 - 6.5

Orthoclase

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

Sanidine

Formula: 
KAlSi3O8
Strunz: 
9.FA.30
Hardness: 
6.0
Vic's Vugh Minerals