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Halite (Photo) [abbr. Hl ]

Year of discovery: Prehistoric (World), 1916 (Japan)

Locality list: 27 localities of halite

• NaCl
• [Na⁺][Cl]^-

• Class: Halite group
• Class: Chloride
• Soluble in: Water
• Insoluble in: HCl
• Taste: Saline
• Fluorescence: UV excitation (Red, Green, Orange)
• Deliquescent

• Na => K: Sylvite
• Na => Ag: Chloraragyrite
• Na => Cu: Nantokite
• Na => NH₄: Salammoniac
• Na => Tl: Lafossaite
• Na => Hg: Calomel

• Cl => F: Villiaumite

• Color: Colorless, Various by impurities or distortion of lattice
• Streak: White
• Luster: Vitreous
• Diaphaneity: Transparent-Translucent

• Habit: Cubic

• Cleavage: Perfect on {100} (3 planes)
• Hardness: 2.5
• Density: 2.2

• System: Cubic
• Group: m3m, Fm3m
• Lattice: a=5.6

Etymology: Hals (salt) in Greek