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Delhayelite & Lamprophyllite

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SHS120254

Delhayelite & Lamprophyllite

Description Tabs

Description
Locality: 
Khibiny Massif, Murmansk Oblast, Russian Federation
Size Range: 
Thumbnail (1-3cm)
Size: 
2.7 × 1.7 × 2.4 cm
Description

Delhayelite and lamprophyllite in matrix

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...