K4IrO4 — Properties & Data | MatWorld

K4IrO4

ceramic

· JVASP-2817· K4IrO4

K₄IrO₄ is an iridium-potassium oxide ceramic compound belonging to the family of mixed-metal oxides. This is a research and specialized material rather than a commodity ceramic, of interest primarily in electrochemistry and catalysis due to iridium's noble-metal stability and catalytic activity in oxidizing environments. The potassium incorporation modifies the crystal structure and surface properties, making it potentially valuable for oxygen evolution reactions, sensor applications, and other electrocatalytic processes where corrosion resistance and catalytic selectivity are critical.

oxygen evolution catalystswater electrolyzer componentselectrochemical sensorscorrosion-resistant coatingsresearch catalysis

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Density(ρ)	4.030	kg/m³	DFT · OptB88vdW

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Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)	0.3080	eV	DFT · OptB88vdW
High-Frequency Dielectric Constant (ε∞)(ε∞)	9.577	-	DFT · OptB88vdW
Electron Effective Mass(m*e)	0.03000	me	DFT · OptB88vdW · 27°C
Hole Effective Mass(m*h)	0.03000	me	DFT · OptB88vdW · 27°C
Magnetic Moment(μB)	2.880	µB	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.000211	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.000342	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-154.9	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	16.58	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C

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)	-1.414	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.

K4IrO4

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental