Na3NpH2O6 — Properties & Data | MatWorld

Na3NpH2O6

ceramic

· JVASP-41050· Na3NpH2O6

Na3NpH2O6 is a complex ceramic compound containing neptunium, sodium, and hydrogen oxide phases, belonging to the family of actinide-based ceramics primarily studied in nuclear materials research. This material is investigated as a potential waste form for neptunium immobilization and as a model compound for understanding actinide chemistry in ceramic matrices, though it remains largely confined to laboratory and nuclear fuel cycle research contexts rather than commercial applications. Its significance lies in fundamental actinide materials science and the development of durable ceramic phases for long-term geological storage of nuclear materials.

nuclear waste immobilizationactinide research materialsplutonium/neptunium fuel cyclesgeological storage formsmaterials chemistry researchactinide mineral analogues

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Density(ρ)	4.320	kg/m³	DFT · OptB88vdW

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Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)	1.262	eV	DFT · OptB88vdW
High-Frequency Dielectric Constant (ε∞)(ε∞)	4.148	-	DFT · OptB88vdW
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	6.500e-7	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.000203	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-419.2	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	412.4	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)	-2.069	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.

Na3NpH2O6

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental