[ Top ] [ Japanese ]

Brazilianite

• NaAl₃(PO₄)₂(OH)₄
• [Na⁺][Al³⁺₃][(OH)₄|(PO₄)₂]^10-

• Class: Phosphate - Hydroxide
• Soluble in: hot H₂SO₄ (Decompose), HF (Decompose)
• Insoluble in: HCl

• [] => 2H₂O: Wardite

• Color: Yellow, Yellowish green
• Streak: White
• Luster: Vitreous
• Diaphaneity: Transparent

• Habit: Pyramidal

• Cleavage: Good on {010} (1 plane)
• Hardness: 5.5
• Density: 3.0

• System: Monoclinic
• Group: 2/m
• Lattice: a=11.2, b=10.1, c=7.1, β=97.6

Etymology: Brazil where this mineral was discovered