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Bastnäsite-(Ce) & Monazite-(Ce)

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PDM739366

Bastnäsite-(Ce) & Monazite-(Ce)

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Description Tabs

Description
Locality: 
Gakara, Bujumbura Rural Province, Burundi
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
8.5 × 3.5 × 1 cm
Description

Slab of a studied sample where brown euhedral crystals of bastnäsite-(Ce) and pink-orange monazite-(Ce) crystals are dispersed on a creamy matrix with greenish sulphides (pyrite?) and black lustrous hematite.

The sample was collected in 1965 by Professor A. Delvaux (1919-1998).

Ex. A. Delvaux. Ex Paul Van Wassenhove. Ex. Bob Liveyns.

Mineral Data
What's on the rock

Bastnäsite-(Ce)

Formula: 
(Ce,La)(CO3)F
Strunz: 
5.BD.20a
Crystal System: 
Hexagonal
Hardness: 
4.0 - 4.5
Type Locality: 
Bastnäs mines, Riddarhyttan, Skinnskatteberg, Västmanland, Sweden

Monazite-(Ce)

Formula: 
(Ce,La,Nd,Th)(PO4)
Strunz: 
8.AD.50
Hardness: 
5.0 - 5.5
Type Locality: 
Ilmen Natural Reserve, Ilmen Mts, Chelyabinsk Oblast', Southern Urals, Urals Region, Russia...

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