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Delhayelite Lamprophyllite & Fenaksite

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SMM724513

Delhayelite Lamprophyllite & Fenaksite

Description Tabs

Description
Locality: 
Yukspor Mountain, Khibiny Massif, Murmansk Oblast, Russian Federation
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5 × 3 × 2 cm
Description

Nice miniature of pale-gray, flat crystals of delhayelite a not spread mineral a bundle of brown long crystals of lamprophyllite and pinkish fenaksite. Very good.

Boxed with Label
Mineral Data
What's on the rock

Delhayelite

Formula: 
(Na,K)10Ca5Al6Si32O80(Cl2,F2,SO4)3·18H2O
Strunz: 
9.EB.10
Crystal System: 
Orthorhombic
Hardness: 
0.0
Type Locality: 
Mt Shaheru, Mt Nyiragongo, Goma, Kivu, Democratic Republic of Congo (Zaïre)

Lamprophyllite

Formula: 
(Sr,K,Ba)2(Na,Ti,Mn2+,Fe3+)4Ti2(Si2O7)2O(O,OH,F)
Strunz: 
9.BE.25
Hardness: 
2.5
Colour: 
Yellow
Type Locality: 
Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia...

Fenaksite

Formula: 
(K,Na)4(Fe,Mn)2(Si4O10)2(OH,F)
Strunz: 
9.DG.70
Hardness: 
5.0 - 5.5
Type Locality: 
Material'naya Adit, Yukspor Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia...

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