Ferrous tungstate

Ferrous tungstate
Names
	IUPAC names Iron(2+) dioxido(dioxo)tungsten [ACD/IUPAC Name]; Tungsten, diolatodioxo-, iron(2+) salt (1:1) [ACD/Index Name];
	Other names Iron(II) tungstate
Identifiers
CAS Number	20405-35-0;
3D model (JSmol)	Interactive image;
ChemSpider	11214118;
ECHA InfoCard	100.034.188
PubChem CID	22178528;
CompTox Dashboard (EPA)	DTXSID00623278;
	InChI InChI=1S/Fe.4O.W/q+2;;;2*-1; Key: SSWAPIFTNSBXIS-UHFFFAOYSA-N;
	SMILES [O-][W](=O)(=O)[O-].[Fe+2];
Properties
Chemical formula	FeWO4, sometimes expressed FeO4W
Molar mass	303.68 g/mol
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Ferrous tungstate (FeWO₄) is an inorganic compound. It can be synthesized from iron(III) chloride and sodium tungstate under hydrothermal conditions with the presence of L-cysteine reduces Fe³⁺ to Fe²⁺.^[1] Ferberite is composed of this compound.^[2]

Synthesis techniques

Hydrothermal process

The hydrothermal process^{[definition needed]} is a method for synthesizing ${\ce {FeWO4}}$ crystals. Reagents used in this process are: - Ethylenediamine tetraacetic acid disodium salt ${\ce {(Na2EDTA)}}$ and Hexamethylenetetramine ${\ce {(HMT)}}$ . ${\ce {Na2EDTA}}$ helps in controlling the morphology of ${\ce {FeWO4}}$ crystals by binding to metal ions and preventing their premature precipitation and ${\ce {HMT}}$ acts as a pH buffer and a source of ammonia.^[3]