Niobium disulfide
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.
NbS2 exfoliated layer | |
NbS2 structure | |
| Names | |
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| IUPAC name
niobium(IV) sulfde, niobium disulfde | |
| Identifiers | |
3D model (JSmol) |
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| ChemSpider | |
PubChem CID |
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CompTox Dashboard (EPA) |
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| Properties | |
| NbS2 | |
| Molar mass | 157.038 g/mol |
| Appearance | Black crystals |
| Density | 4.4 g/cm3 |
| +120·10−6 cm3/mol | |
| Structure | |
| Trigonal, hR9, No. 160 | |
| R3m | |
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).
Infobox references | |
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