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Carbonate

Kimuraite-(Y)

CaY₂(CO₃)₄·6H₂O
Hardness2.5
Crystal systemOrthorhombic
ClassCarbonate
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Kimuraite-(Y) specimen

Kimuraite-(Y) Locality: Kirigo, Hizen-cho, Higashi-Matsuura-gun, Saga Prefecture, Kyushu Region, Japan Field of view 6 mm. Specimen and photo Leon Hupperichs. — Photo: Leon Hupperichs · CC BY-SA 3.0

Kimuraite-(Y)

Kimuraite-(Y) is an IMA-recognized mineral species in the carbonate class, with the chemical formula CaY₂(CO₃)₄·6H₂O.

It crystallizes in the orthorhombic crystal system. It is a member of the Tengerite structural group.

Key properties: Mohs hardness 2.5; specific gravity 2.6; Vitreous to silky on cleavages luster; optically biaxial.

IMA symbol Kmu-Y, IMA status: approved, named in 1984.

Found in fissures in an alkali olivine basalt.

It is found associated with Lanthanite-(Nd), lanthanite-(La), lokkaite-(Y), kozoite-(Nd),.

The mineral was named to honor Professor Kenjiro Kimura (1896–?), Tokyo University, Tokyo, Japan, for his contributions to the mineralogy of rare-earth minerals.

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 K minerals or help write this entry.