NpO2 — Properties & Data | MatWorld

NpO2

ceramic

· JVASP-14982· NpO2

Neptunium dioxide (NpO2) is an actinide ceramic compound used in nuclear fuel and materials research. It is primarily encountered in nuclear engineering and radiochemistry contexts, where it serves as a reference material for studying actinide oxide behavior, thermal properties, and radiation damage mechanisms. NpO2 is notable for its high density and is relevant to researchers investigating advanced nuclear fuel forms and fundamental actinide chemistry, though its use is restricted to specialized nuclear facilities and research institutions.

nuclear fuel researchactinide materials characterizationradiation damage studieshigh-temperature nuclear ceramicsweapons-usable material handlingfundamental actinide science

Compliance & Regulations

?Conflict Free?RoHS?REACH?TSCA?Prop 65

Units:

si imperial

Property	Value	Unit	Conditions
Bulk Modulus(K)	26,865.3	ksi	DFT · OptB88vdW
Poisson's Ratio(ν)	0.3000	-	DFT · OptB88vdW
Shear Modulus(G)	13,378.3	ksi	DFT · OptB88vdW

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

Property	Value	Unit	Conditions	Source
Density(ρ)	0.4115	lb/in³	DFT · OptB88vdW

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

Filter by

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)	0.000	eV	DFT · OptB88vdW
Magnetic Moment(μB)	3.000	µB	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.000163	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.000157	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-15.70	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	-15.40	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C

N entriesMultiple entries per property — large groups are collapsed; click a summary row to expand. Use filters above to narrow by form, heat treatment, basis, or test environment.

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Property	Value	Unit	Conditions	Source
Energy Above Hull(ΔEhull)	0.000	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	-3.510	eV/atom	DFT · OptB88vdW

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

Reference data from cited sources. Not verified or certified by MatWorld Inc. Verify against the source before use in design. Terms: engineering data

Regulatory Screening

Environmental

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.

NpO2

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental