Hingganite-(Nd)
Hingganite-(Nd) is an IMA-recognized mineral species in the silicate class, with the chemical formula Nd₂ Be₂Si₂O₈(OH)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 5.5–6; specific gravity 4.69; White streak; Vitreous luster; optically biaxial.
IMA symbol Hin-Nd, IMA status: approved, named in 2019.
Found in weathered alluvium from gneissic alkaline A-type granite.
It is found associated with Hingganite-(Y), aegirine, microcline, fergusonite-(Y), zircon.
The suffix indicates an analogue of hingganite-(Y), hingganite-(Yb), and hingganite-(Ce), but with Nd dominant among the rare earth elements.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet.
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