NpC — Properties & Data | MatWorld

NpC

ceramic

· JVASP-14949· NpC

Neptunium carbide (NpC) is a transuranium ceramic compound combining neptunium with carbon, belonging to the refractory carbide family. This material is primarily encountered in nuclear fuel research and materials science studies rather than commercial production, where it serves as a model compound for understanding actinide chemistry and high-temperature ceramic behavior. NpC is notable for its extreme density and potential use in advanced nuclear applications, though its radioactive nature, scarcity, and specialized handling requirements limit it to laboratory and research contexts where actinide fuel properties and performance are being investigated.

nuclear fuel researchactinide materials sciencehigh-temperature ceramics characterizationtransuranium compound studiesrefractory ceramic research

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions
Bulk Modulus(K)	160.4	GPa	DFT · OptB88vdW
Poisson's Ratio(ν)	0.4300	-	DFT · OptB88vdW
Shear Modulus(G)	25.60	GPa	DFT · OptB88vdW

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

Property	Value	Unit	Conditions	Source
Density(ρ)	13.49	kg/m³	DFT · OptB88vdW

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

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Method

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)2 entries	0.000	eV	DFT · OptB88vdW
↳	0.000	eV	DFT · TBmBJ
Magnetic Moment(μB)	2.823	µB	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.00000472	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.00000172	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-1.710	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	-1.030	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)	0.02390	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	-0.1396	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.

NpC

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental