Constituent
Name
Magnesium chloride dihydrate
Official name
Magnesium(II) chloride dihydrate
Family
ionic solid
Class
normal salt
Compound type
chloride
Constituent abundance in material
Relevance
main - major
Arrangement
single phase
Mass fraction
1.0 $\pm$ 0.01
Mole fraction
1.0
Chemical composition
Formula
$Mg^{2+}.Cl^-_2 \bullet 2(H_2O)$
Chemical formula
MgCl2.2(H2O)
Elemental formula
(Mg2+) (Cl-)2 H4 O2
Isotope mixture type
terrestrial abundance
  Formula Name Family Number min-max Mole fraction Isotope mole fraction State Relevance
$Mg^{2+}$ Magnesium(II) cation element 1 0.2 1 constituent cation main
$Cl^-$ Chloride anion element 2 0.4 1 constituent anion main
$H_2O$ Water molecule 2 0.4 1 hydration main
Chemical functions
  Function Number Relevance
$R-OH$ 2 main
Chemical bonds
  Bond Number Relevance
$\cdot Mg^{2+} \cdot Cl^-$ 2
$-O \dots H-$ 4
$-O-H$ 2 main
Class
normal salts (07)
Type
hydrated simple normal salts (07.04)
Phase type
crystalline
Comments
Crystal structure: distorted CdI2 structure - Coordination geometry: octahedral
Molar mass
131.24 $g/mol$
Density
2.51 $g/cm^3$