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Montebrasite (Photo)

Year of discovery: 1871 (Montebras mines, France), 1934 (Japan)

Locality list: 3 localities of montebrasite

• LiAlPO₄(OH)
• LiAlPO₄(OH,F)
• [Li⁺][Al³⁺][OH|PO₄]^4-

• Class: Amblygonite group
• Class: Phosphate - Hydroxide
• Soluble in: HCl (Difficult), HNO₃ (Difficult), H₂SO₄ (Difficult)
• Fluorescence: UV excitation (Pale yellow)
• Flame color: Red (Li)

• Al => Fe: Tavorite

• LiAl => Cu₂: Libethenite
• LiAl => Mn₂: Triploidite
• LiAl => Fe₂: Wolfeite, Satterlyite
• LiAl => Mg₂: Hydroxylwagnerite, Holtedahlite, Althausite

• OH => F: Amblygonite (Series)

• Color: White, Colorless, Pale red
• Streak: White
• Luster: Resinous
• Diaphaneity: Transparent-Translucent

• Cleavage: Perfect on {100} (1 plane), Good on {110} (1 plane), Distinct on {0-11} (1 plane), Imperfect on {001} (1 plane)
• Hardness: 5.5-6
• Density: 3.0

• System: Triclinic
• Group: (-1), P(-1)
• Lattice: a=5.2, b=7.1, c=5.1, α=112.0, β=97.9, γ=67.8