Hizenite-(Y)
Hizenite-(Y) is an IMA-recognized mineral species in the carbonate class, with the chemical formula Ca₂Y₆(CO₃)₁₁·14H₂O.
It crystallizes in the orthorhombic crystal system. It is a member of the Tengerite structural group.
Key properties: specific gravity 2.98; White streak; Vitreous to silky luster.
IMA symbol Hiz-Y, IMA status: approved, named in 2011.
Found as a druse in alkali olivine basalt.
It is found associated with Lokkaite- (Y), tengerite-(Y), kimuraite-(Y).
The name refers to “Hizen”, the historic name (between the 7th and 16th centuries) for the locality that produced the first specimens and a suffix for the dominant rare earth element.
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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