Niobium disulfide

Niobium disulfide
	; NbS2 exfoliated layer
	; NbS2 structure
Names
	IUPAC name niobium(IV) sulfde, niobium disulfde
Identifiers
CAS Number	12136-97-9 ;
3D model (JSmol)	Interactive image;
ChemSpider	9980003;
PubChem CID	11805338;
CompTox Dashboard (EPA)	DTXSID50473068 ;
	InChI Key: VRSMQRZDMZDXAU-UHFFFAOYSA-N; InChI=1S/Nb.2S;
	SMILES S=[Nb]=S;
Properties
Chemical formula	NbS2
Molar mass	157.038 g/mol
Appearance	Black crystals
Density	4.4 g/cm3
Magnetic susceptibility (χ)	+120·10−6 cm3/mol
Structure
Crystal structure	Trigonal, hR9, No. 160
Space group	R3m
Lattice constant	a = 0.333 nm, b = 0.333 nm, c = 1.78 nm α = 90°, β = 90°, γ = 120°
Formula units (Z)	3
Related compounds
Other anions	Niobium diselenide, Niobium ditelluride
Other cations	Vanadium disulfide, Tantalum 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

Niobium disulfide is the chemical compound with the formula NbS₂. It is a black layered solid that can be exfoliated into ultrathin grayish sheets similar to other transition metal dichalcogenides. These layers exhibit superconductivity, where the transition temperature increases from ca. 2 to 6 K with the layer thickness increasing from 6 to 12 nm, and then saturates with thickness.^[4]

References

^ ^a ^b ^c Lide, D. R., ed. (2005). CRC Handbook of Chemistry and Physics (86th ed.). Boca Raton (FL): CRC Press. p. 4.76. ISBN 0-8493-0486-5.
^ Lee, P.A. (6 December 2012). Optical and Electrical Properties. Springer Science & Business Media. p. 446. ISBN 978-94-010-1478-6.
^ Rajora, O. S.; Curzon, A. E. (1987). "The preparation and X‐ray diffraction study of the layer materials NbS_xSe_2−x for 0 ≦ x ≦ 2". Physica Status Solidi A. 99: 65–72. doi:10.1002/pssa.2210990108.
^ Yan, Rusen; Khalsa, Guru; Schaefer, Brian T.; Jarjour, Alexander; Rouvimov, Sergei; Nowack, Katja C.; Xing, Huili G.; Jena, Debdeep (2019). "Evolution of superconductivity in ultrathin NbS₂". Applied Physics Express. 12 (2): 023008. arXiv:1803.06097. doi:10.7567/1882-0786/aaff89.

[crc-1] Lide, D. R., ed. (2005). CRC Handbook of Chemistry and Physics (86th ed.). Boca Raton (FL): CRC Press. p. 4.76. ISBN 0-8493-0486-5.

[Lee2012-2] Lee, P.A. (6 December 2012). Optical and Electrical Properties. Springer Science & Business Media. p. 446. ISBN 978-94-010-1478-6.

[str-3] Rajora, O. S.; Curzon, A. E. (1987). "The preparation and X‐ray diffraction study of the layer materials NbS_xSe_2−x for 0 ≦ x ≦ 2". Physica Status Solidi A. 99: 65–72. doi:10.1002/pssa.2210990108.

[4] Yan, Rusen; Khalsa, Guru; Schaefer, Brian T.; Jarjour, Alexander; Rouvimov, Sergei; Nowack, Katja C.; Xing, Huili G.; Jena, Debdeep (2019). "Evolution of superconductivity in ultrathin NbS₂". Applied Physics Express. 12 (2): 023008. arXiv:1803.06097. doi:10.7567/1882-0786/aaff89.

[1]