Solid phase
Official name
Sodium chloride
Secondary names
Common salt; Halite; Rock salt; Saline; Sodium chloric; Table salt; NaCl
CAS number
7647-14-5
Type
Family
ionic solid
Class
normal salt
Compound type
chloride
Comments
equivalent to mineral Halite
Chemical composition
Formula
$Na^+ \cdot Cl^-$
Chemical formula
NaCl
Elemental formula
(Na+) (Cl-)
Isotope mixture type
terrestrial abundance
4.0
  Formula Name Family Number min-max Mole fraction Isotope mole fraction State Relevance
$Na^+$ Sodium cation element 1 0.5 1 constituent cation main
$Cl^-$ Chloride anion element 1 0.5 1 constituent anion main
Chemical bonds
  Bond Number
$Na^+ \cdot Cl^-$ 6
Class
normal salts (07)
Type
simple normal salts (07.01)
Equivalent mineral
Halite
Phase type
crystalline
Crystal system
isometric (cubic)
Crystal class
hexoctahedral
Crystal class symbol
m-3m (Oh)
Crystal spacegroup
Fm-3m
Molar mass
58.443 $g/mol$
Density
2.165 (calc.: 2.22) $g/cm^3$
State NTP
solid
Phase transitions
Phase transition type Other phases Temperature - Pressure
solid-liquid liquid NaCl 801°C (1074 K) @ 1 bar
Refringence type
isotropic
Refraction index $n_{\alpha}$
1.544 @ 589 nm
Pure color
colorless
Color
colorless, white
Diaphaneity
transparent to translucent
Luster
vitreous
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