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Triphylite

Year of discovery: 1834 (Hühnerkobel mine, Germany), 1977 (Japan)

Locality list: A locality of triphylite

• LiFePO₄
• [Li⁺][Fe²⁺][PO₄]^3-

• Class: Triphylite group
• Class: Phosphate
• Soluble in: HCl, HNO₃, H₂SO₄
• Alter to Vivianite from its surface.

• Fe => Mn: Lithiophilite (Series)

• Color: Greenish brown, Greenish gray
• Tarnish: Black
• Streak: Grayish white
• Luster: Vitreous
• Diaphaneity: Translucent

• Cleavage: Perfect on {001} (1 plane), Good on {010}, Poor on {011} (2 planes)
• Hardness: 4
• Density: 3.5

• System: Orthorhombic
• Group: mmm, Pmna
• Lattice: a=6.0, b=10.4, c=4.7

Etymology: Triphylos (Three tribes) in Greek