Na4NpO5 — Properties & Data | MatWorld

Na4NpO5

ceramic

· JVASP-50887· Na4NpO5

Na4NpO5 is a ceramic compound containing neptunium in the +5 oxidation state, belonging to the family of actinide oxides studied primarily in nuclear materials research. This material is of interest in the nuclear fuel cycle and waste management contexts, where neptunium-bearing ceramics are investigated for their chemical stability, radiation resistance, and potential incorporation into immobilized waste forms. As an actinide oxide ceramic, it represents fundamental research into how transuranium elements can be safely contained and stabilized in crystalline matrices, with applications centered on nuclear waste remediation rather than conventional engineering.

nuclear waste immobilizationactinide material researchradiation-resistant ceramicsnuclear fuel cycle materialsfundamental materials characterizationenvironmental containment

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions
Bulk Modulus(K)	63.02	GPa	DFT · OptB88vdW
Poisson's Ratio(ν)	0.2200	-	DFT · OptB88vdW
Shear Modulus(G)	42.49	GPa	DFT · OptB88vdW

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

Property	Value	Unit	Conditions	Source
Density(ρ)	5.210	kg/m³	DFT · OptB88vdW

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Filter by

Method

Property	Value	Unit	Conditions
Band Gap(Eg)2 entries	2.389	eV	DFT · TBmBJ
↳	0.7700	eV	DFT · OptB88vdW
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	4.559	-	DFT · OptB88vdW
↳	8.313	-	DFT · TBmBJ
Magnetic Moment(μB)	1.000	µB	DFT · OptB88vdW
Spectroscopic Limited Maximum Efficiency (SLME)(SLME)	14.74	%	DFT · TBmBJ

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)	-2.469	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.

Na4NpO5

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental