Sodium tungstate dihydrate | SSHADE

Processing math: 75%

Solid phase

Official name: Sodium tungstate dihydrate

Name and identifiers

Secondary names: Disodium tungstate dihydrate; Sodium tungstate(VI) dihydrate; Sodium wolframate dihydrate; Disodium wolframate dihydrate; disodium dioxido(dioxo)tungsten dihydrate; Sodium tungsten oxide dihydrate; Tungstic acid sodium salt dihydrate
CAS number: 10213-10-2

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

Chemical composition

Formula: $(Na^+)_2 \cdot WO_4^{2-} \bullet 2(H_2O)$
Chemical formula: Na2WO4•2(H2O)
Elemental formula: (Na+)2 W O4 (O-)2 H4
Isotope mixture type: terrestrial abundance

10.0

	Formula	Name	Family	Number min-max	Mole fraction	Isotope mole fraction	State	Relevance
	$Na^+$	Sodium cation	element	2	0.4	1	constituent cation	main
	$(WO_4)^{2-}$	Tungstate anion	chemical function	1	0.2	1	anionic radical	main
	$H_2O$	Water	molecule	2	0.4	1	hydration	main

Chemical functions and bonds

Chemical functions

	Function	Number
	$(WO_4)^{2-}$	1
	$R-OH$	2

Chemical bonds

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

Class: normal salts (07)
Type: simple normal salts (07.01)

Crystallography

Phase type: crystalline
Crystal system: orthorhombic

Physical properties

Molar mass: 329.85 $g/mol$
Density: 3.25 $g/cm^3$

Thermodynamical properties

State NTP: solid

Optical properties

Refringence type: biaxial
Pure color: colorless
Color: white

Links and Publications

Links