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Fersmite & Manganoneptunite

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RSL612103

Fersmite & Manganoneptunite

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Description Tabs

Description
Locality: 
Ilímaussaq, Narsaq, Kujalleq, Greenland
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
1.7 × 0.8 × 0.5 cm
Description

In a matrix formed by snowy white albite we can see a vug filled by yellowish neddles of fersmite. Fersmite is a rare fluoroniobate. They are accompanied by brown manganoneptunite crystals. We will send all analysis to the buyer.

Mineral Data
What's on the rock

Fersmite

Formula: 
(Ca,Y)(Nb,Ta,Ti)2(O,OH)6
Strunz: 
4.DG.05
Hardness: 
4.0 - 4.5
Type Locality: 
Vein No. 37A, Buldym Lake, Vishnevye Mts (Vishnyovye; Cherry), Chelyabinsk Oblast', Southern Urals, Urals Region, Russia...

Manganoneptunite

Formula: 
Na2KLi(Mn2+,Fe2+)2Ti2[Si8O24]
Strunz: 
9.EH.05
Crystal System: 
Monoclinic
Hardness: 
5.0 - 6.0
Colour: 
Red
Type Locality: 
Maly Mannepakhk Mt (Malyi Mannepakhk Mt), Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia...
Analysis
Analysis Report - only: Fersmite & Manganoneptunite
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