Manganese dioxide (MnO2) is a ceramic oxide semiconductor with a layered crystal structure commonly found in the pyrolusite mineral form. It is widely used in battery technologies (particularly alkaline and lithium-ion cells), water treatment systems, and catalytic applications where its redox properties and surface reactivity are exploited. Engineers select MnO2 for energy storage and environmental remediation because of its low cost, abundance, electrochemical stability, and ability to facilitate both oxidation and reduction reactions—making it particularly valuable in consumer electronics and industrial-scale water purification.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K)2 entries | 15,520.4 | ksi | — | ||
| ↳ | 28,305.6 | ksi | — | ||
Exfoliation Energy(Eexf) | 54.23 | meV/atom | — | ||
Poisson's Ratio(ν) | 0.2500 | - | — | ||
Shear Modulus(G)2 entries | 4,185.7 | ksi | — | ||
| ↳ | 17,942.6 | ksi | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 0.1773 | lb/in³ | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg)2 entries | 1.300 | eV | — | ||
| ↳ | 0.2170 | eV | — | ||
Dielectric Constant (Relative Permittivity)(εr)2 entries | 17.32 | - | — | ||
| ↳ | 27.50 | - | — | ||
Electronic Dielectric Tensor(ε∞) | Matrix (redacted) | - | — | ||
Total Dielectric Tensor(ε) | Matrix (redacted) | - | — | ||
Magnetic Moment(μB) | 5.968 | µB | — | ||
Piezoelectric Modulus(eij) | 0.000 | C/m² | — | ||
Seebeck Coefficient(S) | -195.2 | µV/K | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.00940 | eV/atom | — | ||
Formation Energy(ΔHf)2 entries | -1.800 | eV/atom | — | ||
| ↳ | -1.796 | eV/atom | — |