MnO2
semiconductor· MnO2
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.
alkaline battery cathodeswater purification and treatmentcatalysts for chemical synthesisenergy storage systemsoxygen evolution reactionsair filtration media
Compliance & Regulations
?EAR?Conflict Free?RoHS?REACH?TSCA?Prop 65
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K)2 entries | 107.0 | GPa | — | ||
| ↳ | 195.2 | GPa | — | ||
Exfoliation Energy(Eexf) | 54.23 | meV/atom | — | ||
Poisson's Ratio(ν) | 0.2500 | - | — | ||
Shear Modulus(G)2 entries | 28.86 | GPa | — | ||
| ↳ | 123.7 | GPa | — |
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.
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 4.907 | kg/m³ | — |
Verified Unverified Low confidence (<80%) Link to source
| 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 | — |
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.
Verified Unverified Low confidence (<80%) Link to source
| 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 | — |
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.
Verified Unverified Low confidence (<80%) Link to source
Regulatory Screening
Environmental
Export Control
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.