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Silicate

Hingganite-(Y)

BeY(SiO₄)(OH)
Hardness5–5.5
Crystal systemMonoclinic
ClassSilicate
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Hingganite-(Y) specimen

Hingganite-(Y) Locality: Trimouns Talc Mine, Luzenac , Ariège , Midi-Pyrénées , France ( Locality at mindat.org ) SHARP xls to 3 mm or so, perched dramatically in a crevasse. Tiny yellow microcrystals of something else in association 3.5 x 3 x 3 cm — Photo: Robert M. Lavinsky · CC BY-SA 3.0

Hingganite-(Y)

Hingganite-(Y) is an IMA-recognized mineral species in the silicate class, with the chemical formula BeY(SiO₄)(OH).

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

Key properties: Mohs hardness 5–5.5; specific gravity 4.42–4.57; Vitreous. Optical Class. Biaxial (+) luster.

IMA symbol Hin-Y, IMA status: approved, named in 1981.

Found in a RE, Be-bearing granophyre (Greater Khingan Range, China); in “amazonite"-rich pegmatite in a differentiated alkalic massif (Kola Peninsula, Russia).

It is found associated with Hingganite-(Ce), quartz, potassium feldspar, albite, zinnwaldite, cassiterite, stokesite, fluorite, chlorite, titanite (Tahara area, Japan); aegirine, zircon.

Presumably for the occurrence in the Greater Khingan (Hinggan) Range, China, and predominance of yttrium.

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 H minerals or help write this entry.