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

Units:

si imperial

Property	Value	Unit	Conditions
Bulk Modulus(K)	182.8	GPa	—
Poisson's Ratio(ν)	0.4600	-	—
Shear Modulus(G)	22.00	GPa	—

Verified Unverified Low confidence (<80%) Link to source

Property	Value	Unit	Conditions	Source
Density(ρ)	21.82	kg/m³	—

Verified Unverified Low confidence (<80%) Link to source

Property	Value	Unit	Conditions
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.

Np

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental

Export Control