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Amblygonite

Year of discovery: 1817 (Chursdorf, Germany), 1977 (Japan)

Locality list: A locality of amblygonite

• LiAlPO₄F
• (Li,Na)Al(PO₄)(F,OH)
• [Li⁺][Al³⁺][F|PO₄]^4-

• Class: Amblygonite group
• Class: Phosphate - Fluoride
• Soluble in: HCl (Difficult), HNO₃ (Difficult), H₂SO₄ (Difficult)
• Flame color: Red (Li)

• Li => Na: Lacroixite

• LiAl => Mn²⁺₂: Triplite
• LiAl => Mg²⁺₂: Wagnerite
• LiAl => Fe²⁺₂: Zwieselite
• LiAl => CaMg: Isokite

• F => OH: Montebrasite (Series)

• Color: White
• Streak: White
• Luster: Vitreous-Resinous
• Diaphaneity: Transparent-Translucent

• Habit: Pyramidal

• Cleavage: Perfect on {100} (1 plane), Good on {110} (1 plane), Distinct on {011}, Imperfect on {001} (1 plane)
• Hardness: 5.5-6
• Density: 3.0

• System: Triclinic
• Group: (-1), P(-1)
• Lattice: a=6.6, b=7.7, c=6.9, α=90.4, β=117.3, γ=91.0

Etymology: Ambly (fast) - gonia (angle) in Greek