Solid phase
Official name
Cadmium(II) chloride
Secondary names
Cadmium dichloride; Cadmium chloride
CAS number
10108-64-2
Type
Family
ionic solid
Class
normal salt
Compound type
chloride
Chemical composition
Formula
$Cd^{2+} \cdot (Cl^-)_2$
Chemical formula
CdCl2
Elemental formula
(Cd2+) (Cl-)2
Isotope mixture type
terrestrial abundance
6.0
  Formula Name Family Number min-max Mole fraction Isotope mole fraction State Relevance
$Cd^{2+}$ Cadmium cation element 1 0.3333333333333333 1 constituent cation main
$Cl^-$ Chloride anion element 2 0.6666666666666666 1 constituent anion main
Composition comments
2 hydtates are known: CdCl2•H2O and CdCl2•5H2O
Chemical bonds
  Bond Number
$\cdot Cd^{2+} \cdot Cl^{-}$ 6
Class
normal salts (07)
Type
simple normal salts (07.01)
Phase type
crystalline
Crystal system
trigonal
Crystal class
ditrigonal-scalenohedral
Crystal class symbol
-3m (D3d)
Crystal spacegroup
R-3m
Comments
Although considered to be ionic, CdCl2 has considerable covalent character to its bonding.
Molar mass
183.31 $g/mol$
Density
4.05 $g/cm^3$
State NTP
solid
Phase transitions
Phase transition type Other phases Temperature - Pressure
solid-liquid liquid 568°C (841 K) @1 bar
Refringence type
uniaxial
Pure color
colorless
Color
colorless, white
Diaphaneity
transparent to translucent
Luster
vitreous
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