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Tsepinite-Ca & Kentbrooksite

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BCK847505

Tsepinite-Ca & Kentbrooksite

Type Locality

Description Tabs

Description
Locality: 
Hackman Valley, Mount Yukspor, Khibiny Massif, Murmansk Oblast, Russian Federation
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.8 × 1.9 × 1.5 cm
Description

You are bidding on a small sample with extremely rare needles of tsepinite-Ca on matix with nice groups of kentbrooksite crystals. 

Mineral Data
What's on the rock

Tsepinite-Ca

Formula: 
Ca(Ti,Nb)2(Si4O12)(OH,O)2·3H2O
Strunz: 
9.CE.30b
Hardness: 
0.0
Type Locality: 
Lovchorrite Mine, Hackman Valley, Yukspor Mt, Khibiny 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

Seller Information

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