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Bastnäsite-(Y), Bastnasite-(Y)

Year of discovery: 1970 (Verkhnee Espe deposit, Kazakhstan), 2001 (Japan)

Locality list: A locality of bastnäsite-(Y)

• YCO₃F
• YCO₃F
• [Y³⁺][F|CO₃]^3-

• Class: Bastnäsite (Bastnasite) group
• Class: Carbonate - Fluoride

• Y => La: Bastnäsite-(La), Bastnasite-(La)
• Y => Ce: Bastnäsite-(Ce), Bastnasite-(Ce)

• Color: Yellow-Reddish brown
• Streak: White
• Luster: Vitreous
• Diaphaneity: Transparent-Translucent

• Cleavage: Inperfect {1011} (3 planes), Indistinct on {0001} (1 plane)
• Hardness: 4-4.5
• Density: 5.0

• System: Hexagonal
• Group: (-6)m2, P(-6)2c
• Lattice: a=6.6, c=9.5