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Vuoriyarvite-K & Manganoneptunite

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CSL130506

Vuoriyarvite-K & Manganoneptunite

Rare Mineral

Description Tabs

Description
Locality: 
Kaskasnyunchorr Mountain, Khibiny Massif, Murmansk Oblast, Russian Federation
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.3 × 2.8 × 2.4 cm
Description

This is a rare K-Nb silicate mineral of labuntsovite group. It forms white crystals with dark red, prismatic manganneptunite and colorless natrolite. Rich piece with good microcrystals and coverage.

Mineral Data
What's on the rock

Vuoriyarvite-K

Formula: 
K2(Nb,Ti)2(Si4O12)(O,OH)2·4H2O
Strunz: 
9.CE.30b
Crystal System: 
Monoclinic
Hardness: 
4.5
Colour: 
White
Streak: 
White
Type Locality: 
Vuoriyarvi alkaline-ultrabasic massif, Northern Karelia, Murmanskaja Oblast', Northern 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...
Loranth Minerals

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