[ Top ] [ Japanese ]

Euxenite-(Y)

Year of discovery: 1870 (Jølster, Norway), 1940 (Japan)

Locality list: 35 localities of euxenite-(Y)

• (Y,Ca)(Nb,Ti)₂O₆
• (Y,Ca,Ce,U,Th)(Nb,Ta,Ti)₂O₆
• [(Y³⁺,Ca²⁺)][(Nb⁵⁺,Ti⁴⁺)₂O₆]

• Class: Polycrase group
• Class: Niobate
• Insoluble in: HCl
• Radioactive: Moderate

• Nb => Ti: Polycrase-(Y) (Series)
• Nb => Ta: Tanteuxenite-(Y)

• Color: Black
• Streak: Brown
• Luster: Vitreous
• Diaphaneity: Translucnet-Opaque

• Cleavage: No
• Hardness: 5.5-6.5
• Density: 5.5

• System: Orthorhombic
• Group: mmm, Pcan
• Lattice: a=5.6, b=14.6, c=5.2