Ximengite
Natural bismuth phosphate named for China's Ximeng tin-mining district.
Intro adapted from Wikipedia (CC BY-SA).
Ximengite is an IMA-recognized mineral species in the phosphate class, with the chemical formula Bi(PO₄).
It crystallizes in the hexagonal crystal system (space group P3_121). It is a member of the Rhabdophane structural group.
Key properties: Mohs hardness 4.5; specific gravity 5.534; White streak; Vitreous to greasy luster; optically uniaxial.
IMA symbol Xim, IMA status: approved, named in 1985.
An alteration product of bismuthinite in a tin deposit.
It is found associated with Bismuthinite, waylandite, monazite, cassiterite, tourmaline.
The name refers to Ximeng Co., China, in which it was first noted to occur.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data and a Wikipedia introduction — a full written entry hasn’t been published yet.
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