CaS — Properties & Data | MatWorld

CaS

Name: CaS
Brand: MatWorld

ceramic

· CaS

Calcium sulfide (CaS) is an inorganic ceramic compound belonging to the sulfide ceramics family, characterized by ionic bonding between calcium and sulfur atoms. Historically used in specialized optical and photonic applications due to its transparency in the infrared spectrum, CaS has seen limited but persistent industrial interest in phosphor materials, thermal imaging windows, and niche optoelectronic devices. Modern research explores CaS primarily as a model compound for understanding sulfide ceramic properties and as a potential material for high-temperature structural applications, though it remains less common than oxide ceramics in mainstream engineering due to chemical sensitivity and processing challenges.

infrared optics and windowsphosphor and luminescent coatingsthermal imaging componentsresearch ceramicsrefractory applications

Compliance & Regulations

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Units:

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Method

Property	Value	Unit	Conditions
Bulk Modulus(K)2 entries	57.07	GPa	DFT
↳	61.57	GPa	DFT · OptB88vdW
Poisson's Ratio(ν)	0.2200	-	DFT · OptB88vdW
Shear Modulus(G)2 entries	39.22	GPa	DFT
↳	43.96	GPa	DFT · OptB88vdW

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
Density(ρ)	2.611	kg/m³	DFT · OptB88vdW

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Method

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)3 entries	6.000	eV	Measured
↳	2.347	eV	DFT · OptB88vdW
↳	3.289	eV	DFT · TBmBJ
Dielectric Constant (Relative Permittivity)(εr)3 entries	11.53	-	DFT · OptB88vdW
↳	12.09	-	DFT · PBE
↳	8.442 range 5.219–11.66median of 2 measurements	-	DFT · PBEsol
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	5.418	-	DFT · OptB88vdW
↳	4.707	-	DFT · TBmBJ
Electronic Dielectric Tensor(ε∞)	Matrix (redacted)	-	DFT · PBE
Total Dielectric Tensor(ε)	Matrix (redacted)	-	DFT · PBE
Electron Effective Mass(m*e)	0.4000	me	DFT · OptB88vdW · 27°C
Hole Effective Mass(m*h)	0.8500	me	DFT · OptB88vdW · 27°C
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Piezoelectric Modulus(eij)	0.000	C/m²	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.00259	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.00207	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-199.4	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	262.4	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Spectroscopic Limited Maximum Efficiency (SLME)(SLME)	2.320	%	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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Method

Property	Value	Unit	Conditions
Energy Above Hull(ΔEhull)	0.000	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)2 entries	-2.382	eV/atom	DFT · OptB88vdW
↳	-2.452	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.

CaS

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Regulatory Screening

Environmental