Rb2NpO4

ceramic

· JVASP-35385· Rb2NpO4

Rb2NpO4 is an actinide-bearing ceramic compound containing rubidium and neptunium oxides, belonging to the family of nuclear fuel forms and actinide host ceramics. This material is primarily of research and nuclear fuel cycle interest, where it serves as a potential waste form or fuel component for managing neptunium and other transuranium elements in closed nuclear fuel cycles. The compound represents an advanced ceramic alternative for immobilizing long-lived radioactive isotopes, with potential advantages in thermal stability and chemical durability compared to conventional ceramic waste matrices, though it remains largely in the development phase rather than routine industrial production.

nuclear waste immobilizationactinide fuel formsadvanced ceramics researchneptunium host matricestransmutation fuel developmentradioactive materials management

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions
Bulk Modulus(K)	7,059	ksi	DFT · OptB88vdW
Poisson's Ratio(ν)	0.3000	-	DFT · OptB88vdW
Shear Modulus(G)	4,470.1	ksi	DFT · OptB88vdW

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

Property	Value	Unit	Conditions	Source
Density(ρ)	0.2159	lb/in³	DFT · OptB88vdW

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

Filter by

Method

Property	Value	Unit	Conditions
Band Gap(Eg)2 entries	0.3820	eV	DFT · OptB88vdW
↳	1.883	eV	DFT · TBmBJ
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	5.111	-	DFT · OptB88vdW
↳	3.234	-	DFT · TBmBJ
Magnetic Moment(μB)	1.000	µB	DFT · OptB88vdW
Spectroscopic Limited Maximum Efficiency (SLME)(SLME)	25.52	%	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)	-2.748	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.

Rb2NpO4 — Properties & Data | MatWorld

Rb2NpO4

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental