Brown crystal aggregates of the rare REE mineral hingganite-(Ce) from a little known locality in Mongolia (Tsakhirin Khuduk, Khaldzan Buragtag, Myangad District, Khovd Province, Mongolia). — Photo: David Hospital · CC BY-SA 4.0
Hingganite-(Ce)
Hingganite-(Ce) is an IMA-recognized mineral species in the silicate class, with the chemical formula BeCe(SiO₄)(OH).
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 5–6; specific gravity 4.82; White streak; Vitreous. Nonfluorescent luster; optically biaxial.
IMA symbol Hin-Ce, IMA status: approved, named in 2004.
Found in drusy pegmatite.
It is found associated with Quartz, potassium feldspar, albite, zinnwaldite, cassiterite, stokesite, fluorite, chlorite, titanite,.
The name refers to the predominance of cerium and relation to hingganite-(Y).