Solid phase
Official name
Caesium chloride
Secondary names
Cesium chloride
CAS number
7647-17-8
Type
Family
ionic solid
Class
normal salt
Compound type
chloride
Chemical composition
Formula
$Cs^+.Cl^-$
Chemical formula
CsCl
Elemental formula
(Cs+) (Cl-)
Isotope mixture type
terrestrial abundance
4.0
  Formula Name Family Number min-max Mole fraction Isotope mole fraction State Relevance
$Cs^+$ Caesium cation element 1 0.5 1 constituent cation main
$Cl^-$ Chloride anion element 1 0.5 1 anionic radical main
Chemical bonds
  Bond Number
$Cs^+ \cdot Cl^-$ 1
Class
normal salts (07)
Type
simple normal salts (07.01)
Phase name
$\alpha-CsCl$)
Phase type
crystalline
Crystal system
isometric (cubic)
Crystal class
hexoctahedral
Crystal class symbol
m-3m (Oh)
Crystal spacegroup
Pm-3m
Molar mass
168.36 $g/mol$
Density
3.988 $g/cm^3$
State NTP
solid
Phase transitions
Phase transition type Other phases Temperature - Pressure
solid-solid $\beta-CsCl$ $T > 445 °C (718 K)$
Refringence type
isotropic
Refraction index $n_{\alpha}$
1.640 (0.59 μm)
Pure color
colorless
Color
colorless, white
Diaphaneity
transparent to translucent
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