In chemistry, paratungstate refers to the anion with the formula and salts derived from this anion. The term also refers to protonated derivatives of this anion, including . Ammonium paratungstate (or APT), is a key intermediate in the purification of tungsten from its ores.
The salt has been characterized by X-ray crystallography.
The unprotonated anion has C2h symmetry.
See also Metatungstate [W12O40]8-, with idealized Td symmetry.
References