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Ekanite

Year of discovery: 1961 (Ehiliyagoda, Sri Lanka), 2012 (Japan)

Locality list: A locality of ekanite

• Ca₂ThSi₈O₂₀
• (Ca,Fe,Pb)₂(Th,U)Si₈O₂₀
• [Ca²⁺₂][Th⁴⁺][(Si₂O₅)₄]^8-

• Class: Phyllosilicate
• Radioactive: Strong

• Color: Green, Yellow, Dark red
• Streak: White
• Luster: Vitreous
• Diaphaneity: Translucent

• Cleavage: Distinct on {101} (2 planes)
• Hardness: 4.5
• Density: 3.1

• System: Tetragonal
• Group: 422, I422
• Lattice: a=7.5, c=14.9