Sodium sulfate hydrates | SSHADE

Solid phase

Official name: Sodium sulfate hydrates

Name and identifiers

Secondary names: Sodium sulphate hydrates

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

Chemical composition

Formula: $(Na^+)_2 \cdot SO_4^{2-} \bullet n(H_2O)$
Chemical formula: Na2SO4•n(H2O)
Elemental formula: (Na+)2 S (O)3-12 (O-)2 (H)2-20
Isotope mixture type: terrestrial abundance

17.0

	Formula	Name	Family	Number min-max	Mole fraction	Isotope mole fraction	State	Relevance
	$Na^+$	Sodium cation	element	2	0.23529411764705882	1	constituent cation	main
	$(SO_4)^{2-}$	Sulfate anion	chemical function	1	0.11764705882352941	1	anionic radical	main
	$H_2O$	Water	molecule	1 - 10	0.6470588235294118 $\pm$ 0.5294117647058824	1	hydration	main

Chemical functions and bonds

Chemical functions

	Function	Number
	$(SO_4)^{2-}$	1
	$R-OH$	2

Chemical bonds

	Bond	Number
	$Na^+ \cdot O^{-}-$	2
	$-O \dots H-$	n
	$-O-H$	2
	$\dddot - \dddot - \dddot - S \dddot - O^{-1/2}$	4

Class: normal salts (07)
Type: hydrated simple normal salts (07.04)
Group: sulfate (07.01.09)

Crystallography

Phase type: crystalline
Crystal system: various
Crystal class: various
Crystal class symbol: various
Crystal spacegroup: various

Physical properties

Molar mass: 160.055 - 322.20 $g/mol$
Density: 2.664 - 1.464 $g/cm^3$

Thermodynamical properties

State NTP

solid

Phase transitions

Phase transition type	Other phases	Temperature - Pressure
solid-liquid	liquid	32.38°C for decahydrate to 884°C (1157 K) for anhydrous

Optical properties

Refringence type: various
Refraction index $n_{\alpha}$: 1.394 (decahydrate) to 1.468 (anhydrous)
Pure color: colorless
Diaphaneity: transparent to translucent
Luster: vitreous

Links and Publications

Links

Wikipedia: Sodium sulfate