Hafnium disulfide

Hafnium disulfide
Names
	IUPAC name Hafnium disulfide
Identifiers
CAS Number	18855-94-2 ;
3D model (JSmol)	Interactive image;
ChemSpider	8374205 ;
ECHA InfoCard	100.038.738
PubChem CID	101811522;
CompTox Dashboard (EPA)	DTXSID301314401 ;
	InChI InChI=1S/Hf.2S ;
	SMILES S=[Hf]=S;
Properties
Chemical formula	HfS2
Molar mass	246.62 g/mol
Appearance	Brown solid
Density	6.03 g/cm3
Band gap	~1.8 eV (indirect)
Structure
Crystal structure	hP3, P3m1, No 164
Lattice constant	a = 0.363 nm, c = 0.584 nm
Formula units (Z)	1
Related compounds
Other anions	Hafnium dioxide
Other cations	Tungsten disulfide; Molybdenum disulfide
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Hafnium disulfide is an inorganic compound of hafnium and sulfur. It is a layered dichalcogenide with the chemical formula is HfS₂. A few atomic layers of this material can be exfoliated using the standard Scotch Tape technique (see graphene) and used for the fabrication of a field-effect transistor. High-yield synthesis of HfS₂ has also been demonstrated using liquid phase exfoliation, resulting in the production of stable few-layer HfS₂ flakes. Hafnium disulfide powder can be produced by reacting hydrogen sulfide and hafnium oxides at 500–1300 °C.