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Carbonate

Kamotoite-(Y)

Y₂O₄(UO₂)₄(CO₃)₃·14H₂O
Crystal systemMonoclinic
ClassCarbonate
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Kamotoite-(Y) specimen

Kamotoite-(Y) , Astrocyanite-(Ce) , Uranophane - alpha , Uraninite Locality: Kamoto East Open cut, Kamoto, Kolwezi , Western area, Katanga Copper Crescent, Katanga (Shaba) , Democratic Republic of Congo (Zaïre) ( Locality at mindat.org ) Size: 5.8 x 4.7 x 3.8 cm. The kamotoite-(Y) are the vibrant yellow crystalline sprays with individual flat-laying crystals to 6 or 7 mm, accented by microcrystalline uranophane around their periphery and by a small bit of subcrystalline Astrocyanite-(Ce) (blue). TYPE LOCALITY for both Kamotoite-(Y) and Astrocyanite-(Ce). — Photo: Robert M. Lavinsky · CC BY-SA 3.0

Kamotoite-(Y)

Kamotoite-(Y) is an IMA-recognized mineral species in the carbonate class, with the chemical formula Y₂O₄(UO₂)₄(CO₃)₃·14H₂O.

It crystallizes in the monoclinic crystal system (space group P2_1/a).

Key properties: specific gravity 3.93; Vitreous luster; optically biaxial.

IMA symbol Kmt-Y, IMA status: approved, named in 1985.

Formed in the oxidized zone above a uranium-bearing Cu–Co deposit.

It is found associated with Uraninite, uranophane, curite, schoepite, becquerelite, rutherfordine, kasolite, soddyite, schulingite-(Nd), astrocyanite-(Ce), shabaite-(Nd).

The name refers to the occurrence at the Kamoto mine, Congo (Zaire), and its yttrium content.

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.