Solid phase
Official name
Sodium tungstate dihydrate
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
Type
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
  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)
Phase type
crystalline
Crystal system
orthorhombic
Molar mass
329.85 $g/mol$
Density
3.25 $g/cm^3$
State NTP
solid
Refringence type
biaxial
Pure color
colorless
Color
white
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