Manganese(II,III) oxide
| Names | |
|---|---|
| IUPAC name
manganese(II) dimanganese(III) oxide | |
| Other names
Manganese tetroxide; Manganese oxide, Manganomanganic oxide, Trimanganese tetraoxide, Trimanganese tetroxide | |
| Identifiers | |
3D model (JSmol) |
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| ChemSpider | |
| ECHA InfoCard | 100.013.879 |
| EC Number |
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PubChem CID |
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| RTECS number |
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| UNII | |
CompTox Dashboard (EPA) |
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| Properties | |
| Mn3O4 MnO·Mn2O3 | |
| Molar mass | 228.812 g/mol |
| Appearance | brownish-black powder |
| Density | 4.86 g/cm3 |
| Melting point | 1,567 °C (2,853 °F; 1,840 K) |
| Boiling point | 2,847 °C (5,157 °F; 3,120 K) |
| insoluble | |
| Solubility | soluble in HCl |
| +12,400·10−6 cm3/mol | |
| Structure | |
| Spinel (tetragonal), tI28 | |
| I41/amd, No. 141 | |
| Hazards | |
| NIOSH (US health exposure limits): | |
PEL (Permissible) |
C 5 mg/m3 |
REL (Recommended) |
None established |
IDLH (Immediate danger) |
N.D. |
| Thermochemistry | |
Std molar entropy (S⦵298) |
149 J·mol−1·K−1 |
Std enthalpy of formation (ΔfH⦵298) |
−1387 kJ·mol−1 |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references | |
Manganese(II,III) oxide is the manganese oxide with the chemical compound with formula Mn3O4. Manganese is present in two oxidation states, +2 and +3, and the formula is sometimes written as MnO·Mn2O3. Mn3O4 is found in nature as the mineral hausmannite.