K2MgH4 is an ionic metal hydride ceramic compound containing potassium, magnesium, and hydrogen, representing an experimental material within the broader family of complex hydrides. This compound is primarily of research interest for hydrogen storage and energy conversion applications, where its chemical stability and hydride composition make it a candidate material for next-generation solid-state hydrogen storage systems and potentially solid hydrogen fuel cells. K2MgH4 exemplifies the materials science effort to develop high-capacity hydrogen storage media that could enable safer, more compact energy storage compared to conventional gaseous or liquid hydrogen approaches.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K) | 25.99 | GPa | — | ||
Poisson's Ratio(ν) | 0.2000 | - | — | ||
Shear Modulus(G) | 19.81 | GPa | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 1.639 | kg/m³ | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg) | 3.964 | eV | — | ||
Dielectric Constant (Relative Permittivity)(εr)2 entries | 8.165 | - | — | ||
| ↳ | 5.526 range 3.301–7.751median of 2 measurements | - | — | ||
Magnetic Moment(μB) | 0.000 | µB | — | ||
Piezoelectric Modulus(eij) | 0.000 | C/m² | — | ||
Seebeck Coefficient(S) | -224.9 | µV/K | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.000 | eV/atom | — | ||
Formation Energy(ΔHf) | -0.3793 | eV/atom | — |