Np
metal· JVASP-25118· Np
Neptunium (Np) is a synthetic actinide metal produced primarily as a byproduct of nuclear reactor operation and plutonium production. It is highly dense, radioactive, and used almost exclusively in nuclear fuel research, advanced reactor development, and specialized scientific applications where its nuclear properties are exploited rather than its mechanical characteristics.
nuclear fuel researchreactor physics studiesactinide metallurgyweapons-grade material productionscientific isotope applicationsnuclear nonproliferation studies
Compliance & Regulations
?EAR?Conflict Free?RoHS?REACH?TSCA?Prop 65
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K) | 26,508.5 | ksi | — | ||
Poisson's Ratio(ν) | 0.4600 | - | — | ||
Shear Modulus(G) | 3,190.8 | ksi | — |
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 0.7883 | lb/in³ | — |
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg) | 0.000 | eV | — | ||
Magnetic Moment(μB) | 0.00100 | µB | — | ||
Seebeck Coefficient(S) | 17.01 | µV/K | — |
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.000 | eV/atom | — | ||
Formation Energy(ΔHf) | 0.000 | eV/atom | — |
Verified Unverified Low confidence (<80%) Link to source
Regulatory Screening
Environmental
Export Control
RoHS, REACH, and Prop 65 statuses are validated against official substance lists (ECHA SVHC Candidate List, OEHHA Prop 65, RoHS Annex II). Other regulations are estimated from composition and material classification. All screening is a starting point for due diligence — always verify with your supplier before making compliance decisions.