Rock salt

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halite (rock salt) Mineral, NaCl; sp. gr. 2.2; hardness 2.5; cubic; perfect cubic cleavage; colourless, white, or shades of yellow, red, and blue; white streak; vitreous lustre; crystals usually cubes, often with curved faces, but it can be granular and compact; widely distributed in stratified evaporite deposits, associated with other water-soluble minerals (e.g. sylvite) and with gypsum and anhydrite of various geologic ages, large masses frequently forming plugs which rise through and arch overlying sedimentary rocks, thereby forming oil traps; soluble in water; tastes salty. It is widely used as a road dressing in icy weather.

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hal·ite / ˈhaˌlīt; ˈhāˌlīt/ • n. sodium chloride as a mineral, typically occurring as colorless cubic crystals; rock salt.

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halite (NaCl) Sodium chloride, or common (rock) salt. It is found in some sedimentary rocks, and in salt domes and dried lakes. It is colourless, white or grey with a glassy lustre. It has a cubic system of interlocking cubic crystals, granules and masses. It is important as a source of chlorine. Hardness 2.5; r.d. 2.2.

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rock salt • n. common salt occurring naturally as a mineral; halite.

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rock salt See HALITE.

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