KMgH3 — Properties & Data | MatWorld

KMgH3

ceramic

· KMgH3

KMgH3 is a metal hydride ceramic compound containing potassium, magnesium, and hydrogen, representing an emerging class of hydrogen-storage and energy materials under active research. This material family is being investigated primarily for hydrogen storage applications in fuel cell systems and clean energy infrastructure, where high hydrogen density and thermal stability are critical. KMgH3 is notable as a complex hydride that offers potential advantages in volumetric hydrogen capacity compared to conventional metal hydrides, though engineering adoption remains limited pending development of practical synthesis routes and performance optimization at scale.

hydrogen storage systemsfuel cell technologyclean energy researchadvanced ceramics developmentthermochemical energy storageexperimental materials

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions
Bulk Modulus(K)	5,496.9	ksi	DFT · OptB88vdW
Poisson's Ratio(ν)	0.1500	-	DFT · OptB88vdW
Shear Modulus(G)	5,099.5	ksi	DFT · OptB88vdW

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

Property	Value	Unit	Conditions	Source
Density(ρ)	0.06250	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	3.471	eV	DFT · OptB88vdW
↳	5.500	eV	DFT · TBmBJ
Dielectric Constant (Relative Permittivity)(εr)3 entries	9.164	-	DFT · OptB88vdW
↳	9.450	-	DFT · PBE
↳	6.460 range 3.705–9.214median of 2 measurements	-	DFT · PBEsol
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	3.487	-	DFT · OptB88vdW
↳	2.563	-	DFT · TBmBJ
Electronic Dielectric Tensor(ε∞)	Matrix (redacted)	-	DFT · PBE
Total Dielectric Tensor(ε)	Matrix (redacted)	-	DFT · PBE
Electron Effective Mass(m*e)	0.1800	me	DFT · OptB88vdW · 27°C
Hole Effective Mass(m*h)	0.8000	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	0.000313	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.00243	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-48.68	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	266.3	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)	-0.3895	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.

KMgH3

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental