Solid phase
Official name
Sodium metatungstate
Secondary names
Sodium polytungstate
CAS number
12141-67-2
Family
ionic solid
Class
normal salt
Compound type
tungstate
Formula
$Na^+_6 \cdot (H_2W_{12}O_{40}^{6-}
Chemical formula
Na6.[H2W12O40]
Elemental formula
(Na+)6 W12 O36 (O-)6 H2
Isotope mixture type
terrestrial abundance
124.0
  Formula Name Family Number min-max Mole fraction Isotope mole fraction State Relevance
Na+ Sodium cation element 6 0.0967741935483871 1 constituent anion main
W Tungsten element 12 0.1935483870967742 1 constituent element main
O Oxygen element 36 0.5806451612903226 1 constituent element main
O Oxide anion element 6 0.0967741935483871 1 constituent anion main
H Hydrogen element 2 0.03225806451612903 1 constituent element main
Composition comments
The salt contains the cage protonated anion (H_2W_{12}O_{40}^{6-}
Chemical bonds
  Bond Number
Na+O 6
≥∣WO 66
≥∣WO 6
OH 2
Class
normal salts (07)
Type
simple normal salts (07.01)
Phase type
crystalline
Crystal system
unknown
Molar mass
2986.01 g/mol
State NTP
solid
Pure color
white
Color
white