Magnesium(II) chloride hexahydrate | SSHADE

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Solid phase

Official name: Magnesium(II) chloride hexahydrate

Name and identifiers

Secondary names: Magnesium dichloride hexahydrate; Dichloromagnesium hexahydrate; Bischofite; MgCl2.6H2O
CAS number: 7791-18-6

Family: ionic solid
Class: normal salt
Compound type: chloride

Chemical composition

Formula: $Mg^{2+}.Cl^-_2 \bullet 6(H_2O)$
Chemical formula: MgCl2.6(H2O)
Elemental formula: (Mg2+) (Cl-)2 H12 O6
Isotope mixture type: terrestrial abundance

18.0

	Formula	Name	Family	Number min-max	Mole fraction	Isotope mole fraction	State	Relevance
	$Mg^{2+}$	Magnesium(II) cation	element	1	0.1111111111111111	1	constituent cation	main
	$Cl^-$	Chloride anion	element	2	0.2222222222222222	1	constituent anion	main
	$H_2O$	Water	molecule	6	0.6666666666666666	1	hydration	main

Chemical functions and bonds

Chemical functions

	Function	Number
	$R-OH$	2

Chemical bonds

	Bond	Number
	$\cdot Mg^{2+} \cdot Cl^-$	2
	$-O \dots H-$	12
	$-O-H$	2

Class: normal salts (07)
Type: hydrated simple normal salts (07.04)

Associated phases

Equivalent mineral: Bischofite

Crystallography

Phase type: crystalline
Crystal system: monoclinic
Crystal class: prismatic
Crystal class symbol: 2/m (C2h)
Crystal spacegroup: C2/m

Physical properties

Molar mass: 203.31 $g/mol$
Density: 1.57 $g/cm^3$

Thermodynamical properties

State NTP: solid

Optical properties

Refringence type: biaxial
Refringence sign: positive
Birefringence: 0.033
Refraction index $n_{\alpha}$: 1.495
Refraction index $n_{\beta}$: 1.507
Refraction index $n_{\gamma}$: 1.528
Dispersion V: r > v, weak
Pure color: colorless
Color: colorless, white
Diaphaneity: transparent to translucent
Luster: vitreous

Links and Publications

Links