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Parakeldyshite & Kentbrooksite

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CSL87509

Parakeldyshite & Kentbrooksite

Rare Mineral

Description Tabs

Description
Locality: 
Takhtarvumchorr Mountain, Khibiny Massif, Murmansk Oblast, Russian Federation
Size Range: 
Thumbnail (1-3cm)
Size: 
1.7 × 2.5 × 2.7 cm
Description

White parakeldyshite with red kentbrooksite on matrix.

Mineral Data
What's on the rock

Parakeldyshite

Formula: 
Na2ZrSi2O7
Strunz: 
9.BC.10
Hardness: 
5.5 - 6.0
Type Locality: 
Alluaiv Mt, Lovozero Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia...

Kentbrooksite

Formula: 
(Na,REE)15(Ca,REE)6(Mn2+,Fe2+)3Zr3Nb[Si25O74]F2·2H2O
Strunz: 
9.CO.10
Crystal System: 
Trigonal
Hardness: 
5.0 - 6.0
Streak: 
White.
Type Locality: 
Kentbrooksite occurrence, Amdrup Firth, Kangerlussuaq Firth, Tunu Province (East Greenland), Greenland
Loranth Minerals

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