Metatungstate

In chemistry, metatungstate refers to the anion with the formula [W12O40]8- and salts derived from this anion.

The term also refers to protonated derivatives of this anion, including [H2W12O40]6-.

The unprotonated anion [W12O40]8- has Td symmetry.

[1]

M 12 O 40 cage in metatungstate.
One of four equivalent subunit of the M 12 O 40 cage in metatungstate.