Tl2SiF6

ceramic

· Tl2SiF6

Tl₂SiF₆ (thallium hexafluorosilicate) is an inorganic ceramic compound belonging to the fluoride salt family, characterized by strong ionic bonding between thallium cations and hexafluorosilicate anions. This material is primarily encountered in specialized research and industrial fluorine chemistry applications rather than mainstream engineering, where it serves as a precursor or intermediate in fluoride glass synthesis, optical material development, and fluorine compound manufacturing. Its notable properties include high density and significant stiffness, making it of interest for applications requiring dense ceramic phases or in studies of heavy-metal fluoride glasses for infrared optics, though its thallium content and associated toxicity limit deployment to controlled industrial and laboratory settings.

fluoride glass precursorinfrared optical materials researchfluorine chemistry intermediatedense ceramic compoundsspecialized laboratory applicationsheavy-metal fluoride systems

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions
Bulk Modulus(K)	3,882.7	ksi	DFT · OptB88vdW
Poisson's Ratio(ν)	0.3900	-	DFT · OptB88vdW
Shear Modulus(G)	945.6	ksi	DFT · OptB88vdW

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

Property	Value	Unit	Conditions	Source
Density(ρ)	0.2185	lb/in³	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	5.040	eV	DFT · OptB88vdW
↳	6.110	eV	DFT · TBmBJ
Dielectric Constant (Relative Permittivity)(εr)2 entries	10.29	-	DFT · OptB88vdW
↳	16.06	-	DFT · PBE
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	2.878	-	DFT · OptB88vdW
↳	2.346	-	DFT · TBmBJ
Electronic Dielectric Tensor(ε∞)	Matrix (redacted)	-	DFT · PBE
Total Dielectric Tensor(ε)	Matrix (redacted)	-	DFT · PBE
Electron Effective Mass(m*e)	0.4500	me	DFT · OptB88vdW · 27°C
Hole Effective Mass(m*h)	1.270	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	0.00224	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.00216	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-201.7	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	373.7	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Spectroscopic Limited Maximum Efficiency (SLME)(SLME)	0.000	%	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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Property	Value	Unit	Conditions	Source
Energy Above Hull(ΔEhull)	0.000	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	-2.736	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.

Tl2SiF6 — Properties & Data | MatWorld

Tl2SiF6

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental