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Sodalite [abbr. Sdl ]

Year of discovery: 1811 (Ilímaussaq complex, Greenland), 1977 (Japan)

Locality list: A locality of sodalite

• Na₈Al₆Si₆O₂₄Cl₂
• [Na⁺₈][Cl₂|(AlSiO₄)₆]^8-

• Class: Sodalite Group
• Class: Tecto-Aluminosilicate
• Soluble in: HCl, HNO₃
• Fluorescence: UV excitation (Orange), Phosphorescence (Yellow), Cathodo luminescence
• Odor: Rotten egg odor (by hitting or solving in HCl)

• Al₄ => Be₂Si₂: Tugtupite

• Cl₂ => SO₄: Nosean
• Cl₂ => S: Lazurite

• Color: Colorless, White, Pale yellow, Green, Blue, Purple
• Streak: White
• Luster: Vitreous
• Diaphaneity: Transparent-Translucent

• Habit: Dodecahedral

• Cleavage: Poor on {110} (3 planes)
• Hardness: 5.5-6
• Density: 2.7

• System: Cubic
• Group: (-4)2/m, P(-4)3n
• Lattice: a=8.9

Etymology: Sodium in chemical composition