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), (NH4)10 is a key intermediate in the purification of tungsten from its ores.
The salt (NH4)10(W12O42)·4H2O has been characterized by X-ray crystallography.
The unprotonated anion has C2h symmetry.
See also
- Metatungstate , with idealized Td symmetry.
References
- Lassner, Erick; Schubert, Wolf-Dieter; Lüderitz, Eberhard; Wolf, Hans Uwe. "Tungsten, Tungsten Alloys, and Tungsten Compounds". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a27_229. ISBN 978-3527306732.
- d'Amour, Hedwig; Allmann, Rudolf (1972). "Die Kristallstruktur des Ammoniumparawolframat-tetrahydrats (NH4)10[H2W12O42]·4H2O". Zeitschrift für Kristallographie. 136 (1–2): 23–47. Bibcode:1972ZK....136...23D. doi:10.1524/zkri.1972.136.1-2.23.
| Tungsten compounds | |||||
|---|---|---|---|---|---|
| Tungsten(0) | |||||
| Tungsten(II) | |||||
| Tungsten(III) | |||||
| Tungsten(IV) | |||||
| Tungsten(V) | |||||
| Tungsten(VI) |
| ||||