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Mieite-(Y)

Year of discovery: 2015 (Japan as the first occurence in the World)

Locality list: 3 localities of mieite-(Y)

• Y₄Ti(SiO₄)₂OF₆
• (Y,Dy,Er)₄(Ti,Al)(SiO₄)₂O(F,OH)₆
• [Y³⁺₄][Ti⁴⁺][F₆|O|(SiO₄)₂]^16-

• Class: Nesosilicate - Oxide - fluoride
• Radioactive: Weak

• Color: Pale yellow
• Streak: White
• Luster: Adamantine
• Diaphaneity: Transparent

• Cleavage: No
• Hardness: 6
• Density: 4.0

• System: Orthorhombic
• Group: mmm, Cmcm
• Lattice: a=15.0, b=10.5, c=7.0

Synonym: Yftisite-(Y)