Halite

Halite
Halite
	Halite from the Wieliczka salt mine, Małopolskie, Poland
General
Category	Halide mineral
Formula; (repeating unit)	NaCl
IMA symbol	Hl
Strunz classification	3.AA.20
Crystal system	Cubic
Crystal class	Hexoctahedral (m3m) ; H-M symbol: (4/m 3 2/m)
Space group	Fm3m
Unit cell	a = 5.6404(1) Å; Z = 4
Identification
Formula mass	58.433 g/mol
Color	Colorless or white when pure. Impurities produce any color but usually yellow, gray, black, brown, red (Depends on isotopes and purity for various colours)
Crystal habit	Predominantly cubes and in massive sedimentary beds, but also granular, fibrous and compact
Cleavage	Perfect {001}, three directions cubic
Fracture	Conchoidal
Tenacity	Brittle
Mohs scale hardness	2.0–2.5
Luster	Vitreous
Streak	White
Diaphaneity	Transparent to Translucent
Specific gravity	2.17
Optical properties	Isotropic
Refractive index	n = 1.544
Melting point	800.7 °C
Solubility	Water-soluble
Other characteristics	Salty flavor, fluorescent
References

Halite (/ˈhælaɪt, ˈheɪlaɪt/ HAL-yte, HAY-lyte),^[7]^[8]^[9] commonly known as rock salt, is a type of salt, the mineral (natural) form of sodium chloride (Na Cl). Halite forms isometric crystals.^[10] The mineral is typically colorless or white, but may also be light blue, dark blue, purple, pink, red, orange, yellow or gray depending on inclusion of other materials, impurities, and structural or isotopic abnormalities in the crystals.^[11] It commonly occurs with other evaporite deposit minerals such as several of the sulfates, halides, and borates. The name halite is derived from the Ancient Greek word for "salt", ἅλς (háls).^[3]

^ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
^ ^a ^b Geology.com: Halite
^ ^a ^b "Halite" (PDF). Handbook of Mineralogy. Archived (PDF) from the original on June 28, 2010. Retrieved 16 April 2018.
^ "Halite". Mindat.org. Archived from the original on 2011-08-05.
^ "Halite". Webmineral. Archived from the original on 2004-11-24.
^ Haynes, William M., ed. (2011). CRC Handbook of Chemistry and Physics (92nd ed.). CRC Press. ISBN 978-1439855119.
^ "halite". Merriam-Webster.com Dictionary.
^ "halite". Dictionary.com Unabridged (Online). n.d.
^ "Halite". Random House Unabridged Dictionary. 1997. Archived from the original on 2015-10-02.
^ Bonewitz, Ronald Louis (2012). Rocks and Minerals. DK Publishing. p. 110. ISBN 978-0-7566-9042-7.
^ Sonnenfeld, Peter (January 1995). "The color of rock salt—A review". Sedimentary Geology. 94 (3–4): 267–276. Bibcode:1995SedG...94..267S. doi:10.1016/0037-0738(94)00093-A.

[1] Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.

[geocomhalite-2] Geology.com: Halite

[Handbook-3] "Halite" (PDF). Handbook of Mineralogy. Archived (PDF) from the original on June 28, 2010. Retrieved 16 April 2018.

[Mindat-4] "Halite". Mindat.org. Archived from the original on 2011-08-05.

[Webmin-5] "Halite". Webmineral. Archived from the original on 2004-11-24.

[Haynes-6] Haynes, William M., ed. (2011). CRC Handbook of Chemistry and Physics (92nd ed.). CRC Press. ISBN 978-1439855119.

[7] "halite". Merriam-Webster.com Dictionary.

[8] "halite". Dictionary.com Unabridged (Online). n.d.

[9] "Halite". Random House Unabridged Dictionary. 1997. Archived from the original on 2015-10-02.

[10] Bonewitz, Ronald Louis (2012). Rocks and Minerals. DK Publishing. p. 110. ISBN 978-0-7566-9042-7.

[11] Sonnenfeld, Peter (January 1995). "The color of rock salt—A review". Sedimentary Geology. 94 (3–4): 267–276. Bibcode:1995SedG...94..267S. doi:10.1016/0037-0738(94)00093-A.

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