Ammonium hexafluorotitanate

Ammonium hexafluorotitanate
Identifiers
CAS Number	16962-40-6;
3D model (JSmol)	Interactive image;
ECHA InfoCard	100.037.291
PubChem CID	24852291;
CompTox Dashboard (EPA)	DTXSID30937653 ;
	SMILES [NH4+].[NH4+].[F-].[F-].[F-].[F-].[F-].[F-].[Ti+4];
Properties
Chemical formula	F6H8N2Ti
Molar mass	197.935 g·mol−1
Appearance	white solid
Density	1.675g/cm3
Related compounds
Other anions	Hexafluorosilicate; Hexafluorotitanic acid
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Ammonium hexafluorotitanate is the inorganic compound with the chemical formula (NH₄)₂[TiF₆]. A colorless salt, the compound consists of ammonium ions and the hexafluorotitanate dianion. It is encountered in the extraction of titanium from its principal ore ilmenite: the ore is treated with excess ammonium fluoride:

FeTiO₃ + 10 NH₄F → (NH₄)₂FeF₄ + (NH₄)₂TiF₆ + 6 H₂O

After removal of iron impurities, the titanium is recovered as a hydrated titanium dioxide by treatment of the aqueous extract of the hexafluoride with ammonia:

(NH₄)₂TiF₆ + 4 NH₃ + 2 H₂O → TiO₂ + 6 NH₄F

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