view crystal in whole frame

Atomic Positional Parameters
Na 4a 0.0000 0.0000 0.0000
Cl 4b 0.5000 0.5000 0.5000

References
WT Barrett, WE Wallace (1954) Journal of the American Chemical Society, 76, 366
WL Bragg (1914) Proceedings of the Royal Society, A, 89, 468

Mineral Chemistry
Halite, or rock salt, was the first crystal structure analysed by X-rays. It forms the type structure for halide minerals with the formula, AX, where A = Na, K, or Li, and X = Cl or F. These include villiaumite (NaF), carobbiite (KF) and griceite (LiF). Both galena (PbS) and periclase (MgO) are isostructural with halite. Deposition by evaporation of seawater or salt lakes leads to sedimentary halite deposits associated with gypsum (CaSO₄.2H₂O), anhydrite (CaSO₄), carnallite (KMgCl₃.6H₂O), sylvine (KCl) and kieserite (MgSO₄.H₂O). Salt domes arise from plastic deformation of deep beds of rock salt.

The CHIME figure shows chlorines as green spheres and sodiums as blue spheres. The unit cell coincides with the cube shape shown by the total number of atoms in the CHIME figure.