NaS2 — Properties & Data | MatWorld

NaS2

ceramic

· JVASP-45298· NaS2

Sodium disulfide (NaS₂) is an inorganic ceramic compound belonging to the sulfide ceramic family, characterized by ionic bonding between sodium cations and disulfide anions. While primarily known as a research material and chemical intermediate rather than a structural engineering ceramic, NaS₂ appears in specialized applications including high-temperature energy storage systems (particularly sodium-sulfur batteries), solid electrolyte research, and corrosion-resistant coating development. Its potential significance lies in thermal energy storage and electrochemical applications where its ionic conductivity and thermal properties at elevated temperatures may offer advantages over conventional ceramics, though industrial adoption remains limited compared to established ceramic families.

sodium-sulfur battery systemshigh-temperature energy storagesolid electrolyte researchchemical intermediate synthesiscorrosion-resistant coatings

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions
Bulk Modulus(K)	26.13	GPa	DFT · OptB88vdW
Poisson's Ratio(ν)	-0.4700	-	DFT · OptB88vdW
Shear Modulus(G)	8.420	GPa	DFT · OptB88vdW

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Property	Value	Unit	Conditions	Source
Density(ρ)	2.157	kg/m³	DFT · OptB88vdW

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Filter by

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)	1.984	eV	DFT · OptB88vdW
Dielectric Constant (Relative Permittivity)(εr)	8.592	-	DFT · OptB88vdW
High-Frequency Dielectric Constant (ε∞)(ε∞)	5.521	-	DFT · OptB88vdW
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Piezoelectric Modulus(eij)	0.1845	C/m²	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.000766	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.000506	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-315.2	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	397.2	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)	-0.6946	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.

NaS2

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental