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Silicate

Batievaite-(Y)

Ca₂Y₂[(H₂O)₂   ]Ti(Si₂O₇)₂(OH)₂(H₂O)₂
Hardness5–5.5
Crystal systemTriclinic
ClassSilicate
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Batievaite-(Y)

Batievaite-(Y) is an IMA-recognized mineral species in the silicate class, with the chemical formula Ca₂Y₂[(H₂O)₂   ]Ti(Si₂O₇)₂(OH)₂(H₂O)₂.

It crystallizes in the triclinic crystal system (space group P-1). It is a member of the Seidozerite-Rinkite structural group.

Key properties: Mohs hardness 5–5.5; specific gravity 3.45; White streak; Dull, greasy or pearly luster; optically biaxial.

IMA symbol Bvt-Y, IMA status: approved, named in 2015.

Found in nepheline syenite pegmatite near its contact with essexite in an alkaline massif, formed at the late-pegmatitic or hydrothermal stage.

It is found associated with Hainite, calcite, albite, natrolite, nepheline, albite, alkaline pyroxenes, amphiboles, biotite, zeolites.

The mineral was named to honor Russian geologist Iya Dmitrievna Batieva (1922-2007) for her contributions to the geology and petrology of metamorphic and alkaline complexes of the Kola Peninsula.

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 B minerals or help write this entry.