Iron tungstate

Structural formula
General
Surname	Iron tungstate
other names	Iron tungsten oxide
Molecular formula	Apartment 4
Brief description	black solid
External identifiers / databases
CAS number 13870-24-1 EC number 237-622-9 ECHA InfoCard 100.034.188 PubChem 22178528 Wikidata Q15628113
properties
Molar mass	303.68 g mol −1
Physical state	firmly
density	6.64 g cm −3
safety instructions
GHS labeling of hazardous substances no GHS pictograms H and P phrases H: no H-phrases P: no P-phrases
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Iron tungstate is an inorganic chemical compound of iron from the group of tungstates .

Occurrence

Iron tungstate occurs naturally in the form of the mineral ferberite .

Extraction and presentation

Iron tungstate can be obtained by reacting ammonium iron (II) sulfate with sodium tungstate .

${\displaystyle \mathrm {(NH_{4})_{2}Fe(SO_{4})_{2}+Na_{2}WO_{4}\ \longrightarrow {}\ FeWO_{4}\downarrow +(NH_{4})_{2}SO_{4}+Na_{2}SO_{4}} }$

properties

Iron tungstate is a black solid. The compound is a p-type semiconductor . It has a monoclinic crystal structure with the space group P 2 / a (space group no. 13, position 3) .

Individual evidence

1. ↑ ^{a b c d} R. Blachnik: Pocket book for chemists and physicists Volume 3: Elements, inorganic compounds and materials, minerals . Springer-Verlag, 2013, ISBN 978-3-642-58842-6 , pp. 462 ( limited preview in Google Book search).
2. ↑ ^{a b} InfoCard for Iron tungsten tetraoxide from the European Chemicals Agency (ECHA), accessed on April 18, 2020.
3. ↑ ^{a b c} S. Rajagopal, D. Nataraj, O. Yu. Khyzhun, Yahia Djaoued, J. Robichaud, D. Mangalaraj: Hydrothermal synthesis and electronic properties of FeWO4 and CoWO4 nanostructures. In: Journal of Alloys and Compounds. 493, 2010, p. 340, doi : 10.1016 / j.jallcom.2009.12.099 .