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Kamphaugite-(Y) & Polycrase-(Y)

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SER939431

Kamphaugite-(Y) & Polycrase-(Y)

Description Tabs

Description
Locality: 
Baveno, Verbano-Cusio-Ossola Province, Piedmont, Italy
Class: 
Crystal Group/Cluster
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.5 × 3.1 × 2.1 cm
Description

some white, tetragonal clusters of kamphaugite-Y on light blue albite with a tiny, brown polycrase-Y crystal hosting some epitactic aeschynite-Y crystals

Mineral Data
What's on the rock

Kamphaugite-(Y)

Formula: 
Ca(Y,REE)(CO3)2(OH)·H2O
Strunz: 
5.DC.10
Crystal System: 
Tetragonal
Hardness: 
2.0 - 3.0
Streak: 
White
Type Locality: 
Hørtekollen, Sylling, Lier, Buskerud, Norway

Polycrase-(Y)

Formula: 
(Y,U)(Ti,Nb)2O6
Strunz: 
4.DG.05
Hardness: 
5.0 - 6.0
Colour: 
Black
Type Locality: 
Rasvåg feldspar quarries, Hidra (Hitterø), Flekkefjord, Vest-Agder, Norway