LaSF

ceramic

· LaSF

LaSF is a lanthanum-based heavy flint glass ceramic, engineered for high refractive index and low dispersion optical applications. It is primarily used in precision optics, including camera lenses, microscope objectives, and astronomical instruments, where its optical properties enable designers to reduce chromatic aberration and achieve compact lens assemblies. LaSF is favored over conventional glass in high-performance imaging systems where correction of color fringing is critical and space constraints demand efficient optical design.

precision camera opticsmicroscope objectivesastronomical telescopeslaser opticshigh-performance lens designchromatic aberration correction

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Density(ρ)	0.1990	lb/in³	DFT · OptB88vdW

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

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Method

Property	Value	Unit	Conditions
Band Gap(Eg)	1.509	eV	DFT · OptB88vdW
Dielectric Constant (Relative Permittivity)(εr)2 entries	18.82	-	DFT · PBE
↳	11.65 range 5.825–17.47median of 2 measurements	-	DFT · PBEsol
Electronic Dielectric Tensor(ε∞)	Matrix (redacted)	-	DFT · PBE
Total Dielectric Tensor(ε)	Matrix (redacted)	-	DFT · PBE
Magnetic Moment(μB)	0.000	µB	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
Energy Above Hull(ΔEhull)	0.000	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	-3.341	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.

LaSF — Properties & Data | MatWorld

LaSF

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental