Li4CuSi2O7 — Properties & Data | MatWorld

Li4CuSi2O7

ceramic

· JVASP-50463· Li4CuSi2O7

Li4CuSi2O7 is a lithium copper silicate ceramic compound that combines lithium, copper, and silicate phases in a single structure. This material is primarily of research interest for energy storage and electrochemical applications, where the lithium content and mixed-valence copper sites may provide ionic conductivity or electrochemical activity relevant to battery and solid-state electrolyte development. While not yet widely deployed in commercial products, lithium silicates and copper-containing variants are explored as potential components in next-generation lithium-ion systems and solid electrolyte materials where thermal stability and ionic transport properties are critical.

solid-state electrolytes (research)lithium-ion battery materials (developmental)electrochemical deviceshigh-temperature ceramicsmixed-metal silicate compoundsenergy storage research

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Density(ρ)	3.049	kg/m³	DFT · OptB88vdW

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Method

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)	0.6920	eV	DFT · OptB88vdW
Dielectric Constant (Relative Permittivity)(εr)	7.870	-	DFT · OptB88vdW
High-Frequency Dielectric Constant (ε∞)(ε∞)	4.529	-	DFT · OptB88vdW
Magnetic Moment(μB)	0.9990	µB	DFT · OptB88vdW
Piezoelectric Modulus(eij)	0.4697	C/m²	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.0000860	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.000175	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-352.6	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	448.2	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Spectroscopic Limited Maximum Efficiency (SLME)(SLME)	5.840	%	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)	0.04310	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	-2.387	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.

Li4CuSi2O7

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental