2H-NbSe2 （2H Niobium Diselenide）是一種超導體，Tc ≈ 7.2 K；同時也是電荷密度波（Charge Density Waves CDW）系統， Tcdw ≈33 K。它的各層通過范德華相互作用堆疊在一起，可以剝離成薄薄的二維層。2H-NbSe2 屬于第五族過渡金屬二鹵化物（ Transition Metal Dichalcogenides TMDC）。
2H NbSe2 crystal properties
| Crystal size | ~8 mm |
| Electrical properties | Superconductor (Tc~7.2K), Charge Density Waves (CDW) system, Tcdw ~33K |
| Crystal structure | hexagonal |
| Unit cell parameters | a = b = 0.344 nm, c = 1.255 nm, α = β = 90°, γ = 120° |
| Monolayer properties |  Link to C2DB containing calculated properties |
| Type | Synthetic |
| Purity | >99.995 % |
| Characterized by | XRD, Raman, EDX |
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