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Silicate

Gadolinite-(Nd)

Nd₂Fe²⁺Be₂O₂(SiO₄)₂
Hardness6.5–7
Crystal systemMonoclinic
ClassSilicate
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Gadolinite-(Nd)

Gadolinite-(Nd) is an IMA-recognized mineral species in the silicate class, with the chemical formula Nd₂Fe²⁺Be₂O₂(SiO₄)₂.

It crystallizes in the monoclinic crystal system (space group P2_1/c). It is a member of the Gadolinite structural group.

Key properties: Mohs hardness 6.5–7; specific gravity 4.86; White streak; Vitreous to adamantine luster; optically biaxial.

IMA symbol Gad-Nd, IMA status: approved, named in 2016.

Found in Fe-REE “Bastnäs-type” polymetallic skarn deposits.

It is found associated with Fluorbritholite-(Ce), västmanlandite-(Ce), dollaseite-(Ce), bastnäsite-(Ce), tremolite.

Suffix indicates the Nd-dominant member of the gadolinite subgroup.

Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet. Browse more G minerals or help write this entry.