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Fresnoite

Year of discovery: 1965 (Esquire no.7 claim, USA), 2013 (Japan)

Locality list: A locality of fresnoite

• Ba₂TiSi₂O₈
• [Ba²⁺₂][Ti⁴⁺][O|Si₂O₇]^8-

• Class: Sorosilicate - Oxide
• Fluorescence: Short UV excitation (Yellow)

• Color: Greenish yellow, Pale yellow
• Streak: White
• Luster: Vitreous
• Diaphaneity: Translucent

• Cleavage: Distinct on {001} (1 plane)
• Hardness: 3-4
• Density: 4.4

• System: Tetragonal
• Group: 4mm, P4bm
• Lattice: a=8.5, c=5.2