Halite
Halite is the mineral a lot of people call "rock salt". It is a different form of sodium chloride (NaCl). It looks like it is made out of cubes.
Halite | |
---|---|
General | |
Category | Halide mineral |
Formula (repeating unit) | NaCl |
Strunz classification | 03.AA.20 |
Crystal symmetry | Isometric hexoctahedral 4/m 3 2/m |
Unit cell | a = 5.6404(1) Å; Z = 4 |
Identification | |
Molecular mass | 58.433 g/mol |
Color | Colorless or white; also blue, purple, red, pink, yellow, orange, or gray |
Crystal habit | Predominantly cubes and in massive sedimentary beds, but also granular, fibrous and compact |
Crystal system | Cubic |
Cleavage | Perfect {001}, three directions cubic |
Fracture | Conchoidal |
Tenacity | Brittle |
Mohs scale hardness | 2 - 2.5 |
Luster | Vitreous |
Streak | White |
Diaphaneity | Transparent |
Specific gravity | 2.17 |
Optical properties | Isotropic |
Refractive index | n = 1.544 |
Solubility | Water soluble |
Other characteristics | Salty flavor, Fluorescent |
References | [1][2][3] |
Halite Media
Halite cubes from the Stassfurt Potash Deposit, Saxony-Anhalt, Germany (size: 6.7 × 1.9 × 1.7 cm)
Hopper crystal cast of halite in a Jurassic rock, Carmel Formation, Utah
Halite from Potash Corporation of Saskatchewan Mine in Rocanville, Saskatchewan, Canada
References
- ↑ http://rruff.geo.arizona.edu/doclib/hom/halite.pdf Handbook of Mineralogy
- ↑ Mindat.org
- ↑ Webmineral data