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Tschermigite

Year of discovery: 1853 (Cermniky (Tschermig), Czech), 2010 (Japan)

Locality list: A locality of tschermigite

• (NH₄)Al(SO₄)₂,12H₂O
• [NH₄⁺][Al³⁺][(SO₄)₂]^4-,12H₂O

• Class: Alum group
• Class: Ammonium - Sulfate - Hydrate
• Soluble in: Water
• Deliquescent
• Formed by hydration of Godovikovite under ambient condition.

• NH₄ => K: Alum-(K)
• NH₄ => Na: Alum-(Na)
• NH₄ => Tl: Lanmuchangite

• Al => Fe: Lonecreekite

• Color: Colorless, White
• Streak: White
• Luster: Vitreous
• Diaphaneity: Transparent

• Cleavage: Perfect on {100} (3 planes)
• Hardness: 1.5-2
• Density: 1.6

• System: Cubic
• Group: m3, Pa3
• Lattice: a=12.2