Gadolinite-(Nd)

gadolinite-(Nd)

fluorbritholite-(Ce)

vastmanlandite-(Ce)

dollaseite-(Ce)

Images

Formula: Nd₂Fe²⁺Be₂O₂(SiO₄)₂
Nesosilicate (insular SiO₄ groups), gadolinite subgroup, gadolinite group, gadolinite supergroup,
Crystal System: Monoclinic
Specific gravity: 4.86 calculated
Hardness: 6½ to 7
Streak: White
Colour: Olive-green
Environments

Metamorphic environments

Gadolinite-(Nd) was approved in 2016, but to date (June 2022) has been reported only from the type locality.

Localities

At the type locality, the Malmkärra mine, Norberg, Västmanland County, Sweden, gadolinite-(Nd) is associated with fluorbritholite-(Ce), västmanlandite-(Ce), dollaseite-(Ce), bastnäsite-(Ce) and tremolite.
The gadolinite-(Nd) forms anhedral grains up to 150 µm in size, commonly occurring as aggregates of olive-green colour. The crystals are transparent with vitreous to adamantine lustre (MM 82.1.133–S145).

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