Hydroxylbastnäsite-(Nd)

hydroxylbastnasite-(Nd)

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Formula: Nd(CO3)(OH)
Anhydrous carbonate of neodymium, bastnäsite group
Crystal System: Hexagonal
Specific gravity: 4.89 calculated
Hardness: 1 to 2
Streak: White
Colour: White
Luminescence: No fluorescence under UV
Environments

Sedimentary environments

Localities

There are two co-type localities, the Nisi mine, Orchomenus, Boeotia, Central Greece, Greece and Zagrad, Nikšic Municipality, Montenegro.

In the Nikšic Municipality, Montenegro, both hydroxylbastnäsite-(Nd) and hydroxylbastnäsite-(La) have been found (JWW pps 268-270)
The hydroxylbastnäsite-(Nd) has been found in very small quantities as a rare authigenic mineral in the red bauxites near the contact with the footwall limestone. The mineral was concentrated in whitish, irregular aggregates of crystals, usually 100 to 200 microns across, but a few occur as clusters 1 to 5 mm across in which the bastnasite is intergrown with bauxite (MM 49.717-20).

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