Li4NpO5 — Properties & Data | MatWorld

Li4NpO5

ceramic

· JVASP-10487· Li4NpO5

Li4NpO5 is a mixed-valence ceramic compound containing lithium, neptunium, and oxygen, belonging to the actinide oxide family. This is primarily a research material studied for nuclear fuel chemistry and actinide material science rather than a commercial engineering ceramic. The compound is notable within the nuclear materials community for understanding neptunium oxidation states and solid-state chemistry relevant to legacy nuclear fuel reprocessing and disposal strategies.

nuclear fuel researchactinide material sciencelegacy fuel characterizationhigh-temperature ceramic chemistrynuclear waste immobilization studies

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Density(ρ)	0.2094	lb/in³	DFT · OptB88vdW

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Method

Property	Value	Unit	Conditions
Band Gap(Eg)2 entries	0.6700	eV	DFT · OptB88vdW
↳	2.380	eV	DFT · TBmBJ
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	6.217	-	DFT · OptB88vdW
↳	18.20	-	DFT · TBmBJ
Magnetic Moment(μB)	1.000	µB	DFT · OptB88vdW
Spectroscopic Limited Maximum Efficiency (SLME)(SLME)	14.91	%	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)	-2.680	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.

Li4NpO5

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental