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Nesquehonite

Year of discovery: 1890 (Nesquehoning coal mine, USA), 1973 (Japan)

Locality list: 14 localities of nesquehonite

• MgCO₃,3H₂O
• [Mg²⁺][CO₃]^2-,3H₂O

• Class: Carbonate - Hydrate
• Soluble in: Water (Very slightly), HCl (with bubbles), HNO₃ (with bubbles), H₂SO₄ (with bubbles)
• Fluorescence: Short UV excitation (Green)
• Formed on dehydration of Lansfordite.

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

• Habit: Glassy

• Cleavage: Perfect on {101} (1 plane), Good on {010} (1 plane)
• Hardness: 2.5
• Density: 1.8

• System: Monoclinic
• Group: 2/m, P2₁/m
• Lattice: a=7.7, b=5.4, c=12.1, β=90.5