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Takanawaite-(Y)

Year of discovery: 2012 (Japan as the first occurence in the World)

Locality list: A locality of takanawaite-(Y)

• YTaO₄
• [Y³⁺][TaO₄]^3-

• Class: Tantalate

• Polymorph: Yttrotantalite-(Y) (Monoclinic), Iwashiroite-(Y) (Monoclinic), Takanawaite-(Y) (Tetragonal)

• Y => Bi: Bismutotantalite
• Y => Sb: Stibiotantalite

• Y₂ => MnSn; Wodginite
• Y₂ => FeSn; Ferrowodginite
• Y₂ => MnTi; Titanowodginite

• TaO₄ => VO₄: Wakefieldite-(Y)
• TaO₄ => NbO₄: Fergusonite-(Y), β-Fergusonite-(Y), Samarskite-(Y)

• Color: Brown
• Luster: Vitreous
• Diaphaneity: Transparent

• Hardness: 5.5

• System: Monoclinic
• Group: 2/m, I2/a
• Lattice: a=5.3, b=11.0, c=5.1, β=95.0