Niobium disulfide - Misplaced Pages

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Niobium disulfide
Names
NbS₂ exfoliated layer
NbS₂ structure
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==S
Properties
Chemical formula	NbS₂
Molar mass	157.038 g/mol
Appearance	Black crystals
Density	4.4 g/cm
Magnetic susceptibility (χ)	+120·10 cm/mol
Structure
Crystal structure	Trigonal, hR9, No. 160
Space group	R3m
Lattice constant	a = 0.333 nm, b = 0.333 nm, c = 1.78 nmα = 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 , 100 kPa). N verify (what is ?) Infobox references

Chemical compound

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.

References

^ Lide, D. R., ed. (2005). CRC Handbook of Chemistry and Physics (86th ed.). Boca Raton, Florida: 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.