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Silicate

Calcybeborosilite-(Y)

(Y,REE,Ca)₂(B,Be)₂(SiO₄)₂(OH,O)₂
Crystal systemMonoclinic
ClassSilicate
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Calcybeborosilite-(Y) specimen

Greenish grey crystal aggregates of the extremely rare mineral calcybeborosilite-(Y) from the type and only known locality worldwide: Dara-i-Pioz Glacier, Tien Shan Mountains, Region of Republican Subordination, Tajikistan. — Photo: David Hospital · CC BY-SA 4.0

Calcybeborosilite-(Y)

Calcybeborosilite-(Y) is an IMA-recognized mineral species in the silicate class, with the chemical formula (Y,REE,Ca)₂(B,Be)₂(SiO₄)₂(OH,O)₂.

It crystallizes in the monoclinic crystal system (space group P2_1/a). It is a member of the Gadolinite structural group.

IMA symbol Cbbs-Y, IMA status: questionable, named in 2000.

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 C minerals or help write this entry.