NaY3SiS7 — Properties & Data | MatWorld

NaY3SiS7

ceramic

· JVASP-27504· NaY3SiS7

NaY3SiS7 is a rare-earth sulfide ceramic compound containing sodium, yttrium, silicon, and sulfur. This material belongs to the family of sulfide ceramics and appears primarily in research contexts for advanced ceramics development. While not yet established in mainstream industrial production, sulfide ceramics in this composition space are of interest for high-temperature applications and specialized optical or electrolytic functions where traditional oxide ceramics reach their limits.

Research and developmentHigh-temperature ceramicsRare-earth applicationsOptical or photonic materials (potential)Solid-state electrolytes (potential)

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Density(ρ)	3.675	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	2.206	eV	DFT · OptB88vdW
↳	2.918	eV	DFT · TBmBJ
Dielectric Constant (Relative Permittivity)(εr)	19.59	-	DFT · OptB88vdW
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	7.368	-	DFT · OptB88vdW
↳	5.103	-	DFT · TBmBJ
Electron Effective Mass(m*e)	1.137	me	DFT · OptB88vdW · 27°C
Hole Effective Mass(m*h)	2.210	me	DFT · OptB88vdW · 27°C
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Piezoelectric Modulus(eij)	0.1751	C/m²	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.00111	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.000769	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-215.7	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	307.2	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Spectroscopic Limited Maximum Efficiency (SLME)(SLME)	5.620	%	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.

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

Property	Value	Unit	Conditions	Source
Energy Above Hull(ΔEhull)	0.03640	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	-1.767	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.

NaY3SiS7

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental