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Monohydrocalcite

Year of discovery: 1964 (Issyk Kul Lake, Kyrgyzstan), 1993 (Japan)

Locality list: A locality of monohydrocalcite

• CaCO₃,H₂O
• [Ca²⁺][CO₃]^2-,H₂O

• Class: Carbonate - Hydrate
• Fluorescence: UV excitation (Green)

• H₂O => 6H₂O: Ikaite
• H₂O => []: Calcite, Aragonite, Vaterite

• Color: Colorless
• Tarnish: White (by dehydration)
• Streak: White
• Luster: Earthy
• Diaphaneity: Opaque

• Hardness: 2-3
• Density: 2.4

• System: Trigonal
• Group: 3, P3₁
• Lattice: a=10.6, c=7.5

Etymology: Calx(Lime) in Latin