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Boussingaultite

Year of discovery: 1864 (Travale, Italy), 2010 (Japan)

Locality list: A locality of boussingaultite

• (NH₄)₂Mg(SO₄)₂,6H₂O
• [(NH₄)⁺₂][Mg²⁺][(SO₄)₂]^4-,6H₂O

• Class: Ammonium - Sulfate - Hydrate
• Soluble in: Water
• Taste: Astringent, Saline
• Formed by hydration of Efremovite under ambient condition.

• NH₄ => K: Picromerite
• NH₄ => Na: Konyaite

• Mg => Fe: Mohrite (Series)
• Mg => Ni: Nickelboussingaultite

• Color: Colorless
• Streak: White
• Luster: Silky
• Diaphaneity: Transparent

• Cleavage: Perfect on {201} (1 plane)
• Hardness: 2
• Density: 1.7

• System: Monoclinic
• Group: 2/m, P2₁/b
• Lattice: a=9.3, b=12.6, c=6.2, β=107.1