USi2 — Properties & Data | MatWorld

USi2

Name: USi2
Brand: MatWorld

ceramic

· USi2

USi₂ (uranium disilicide) is an intermetallic ceramic compound combining uranium with silicon in a 1:2 stoichiometric ratio. It belongs to the family of transition metal silicides and represents a material of primarily research and nuclear engineering interest rather than widespread commercial use. This compound is explored for specialized high-temperature applications and nuclear fuel contexts where its unique combination of metallic and ceramic characteristics—including high density and stiffness—may offer advantages in extreme environments.

nuclear fuel researchhigh-temperature refractory applicationsintermetallic compositesexperimental aerospace materialsradiation-resistant ceramicsdense ceramic coatings

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions
Bulk Modulus(K)	126.5	GPa	DFT · OptB88vdW
Poisson's Ratio(ν)	0.3500	-	DFT · OptB88vdW
Shear Modulus(G)	54.69	GPa	DFT · OptB88vdW

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

Property	Value	Unit	Conditions	Source
Density(ρ)	8.917	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)	2.070	µB	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.000302	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.000300	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-0.7200	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	-0.6900	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.

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

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Method

Property	Value	Unit	Conditions
Energy Above Hull(ΔEhull)	0.04400	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)2 entries	-0.2209	eV/atom	DFT · OptB88vdW
↳	-0.4481	eV/atom	Measured

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.

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.

USi2

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental