Jingwenite-(Y)
Jingwenite-(Y) is an IMA-recognized mineral species in the silicate class, with the chemical formula YAlV⁴⁺(SiO₄)O₂(OH)₂.
It crystallizes in the monoclinic crystal system (space group I2/a).
Key properties: Mohs hardness 4.5–5; specific gravity 4.475; Yellowish gray streak; Vitreous luster; optically biaxial.
IMA symbol Jw-Y, IMA status: approved, named in 2022.
Abundant in a sediment-hosted, stratiform, copper deposit. HREEs and V likely from leaching of abundant heavy minerals in the footwall red sandstone by oxidized basinal brines.
It is found associated with Bornite, chalcopyrite, galena, xenotime-(Y), nolanite, thortveitite, roscoelite, barite, quartz.
The mineral was named to honor Jingwen Mao (b. 1956), a leading Chinese economic geologist at the China University of Geosciences, Beijing. The suffix identifies the dominant rare earth element.