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Xenotime-(Y) & Fergusonite-(Y) & Samarskite-(Y)

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SYA969386

Xenotime-(Y) & Fergusonite-(Y) & Samarskite-(Y)

Description Tabs

Description
Locality: 
Naegi Placer, Naegi, Nakatsugawa City, Honshu Island, Japan
Class: 
Combination
Size Range: 
Thumbnail (1-3cm)
Size: 
2.8 × 2.8 × 2.5 cm
Largest Crystal: 
0.90cm
Weight: 
10.00gr
Description

Box filled with 10g of rounded crystals and grains (3-9 mm) of brown

xenotime-(Y) and dark brown-black fergusonite-(Y) and samarskite-(Y).

 

Historic ree material from an alluvial placer deposit found before 1910.

Size given is for the box.

Mineral Data
What's on the rock

Xenotime-(Y)

Formula: 
Y(PO4)
Strunz: 
8.AD.35
Crystal System: 
Tetragonal
Hardness: 
4.0 - 5.0
Type Locality: 
Hidra (Hitterø), Flekkefjord, Vest-Agder, Norway

Fergusonite-(Y)

Formula: 
YNbO4
Strunz: 
7.GA.05
Hardness: 
5.5 - 6.5
Type Locality: 
Kangeq, Sermersoq Island, Kujalleq, Greenland

Samarskite-(Y)

Formula: 
(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
Strunz: 
4.DB.25
Hardness: 
5.0 - 6.0
Type Locality: 
Blyumovskaya Pit (Blum Pit; Pit No. 50), Ilmen Natural Reserve, Ilmen Mts, Chelyabinsk Oblast', Southern Urals, Urals Region, Russia...

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