Sodium manganite
| Sodium manganite | |
|---|---|
| IUPAC name | sodium manganese dioxide |
| Properties | |
| Chemical formula | NaMnO2 |
| Molar mass | 109.93 g mol−1 |
| Structure (α-form)[1] | |
| Crystal structure | Distorted halite (NaCl) |
| Space group | C2/m (No. 12) |
| Lattice constant | a = 566.2 pm, b = 286.0 pm, c = 579.9 pm, α = 90°, β = 113.1°, γ = 90° |
| Coordination geometry | Distorted octahedral (Na+, Mn3+) Distorted octahedral (O2−) |
| Structure (β-form)[2] | |
| Crystal structure | Distorted halite (NaCl) |
| Space group | Pmnm |
| Lattice constant | a = 285(9) pm, b = 633(8) pm, c = 478(5) pm |
| Coordination geometry | Distorted octahedral (Na+, Mn3+) Distorted octahedral (O2−) |
| Related compounds | |
| Other anions | Sodium manganate Sodium permanganate |
| Other cations | Lithium manganite Potassium manganite |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) | |
Sodium manganite, NaMnO2, is a mixed oxide of sodium and manganese(III). It adopts a distorted halite (NaCl) structure in its two crystalline forms, with the MnO6 octahedra being distorted by the Jahn–Teller effect of the d4 Mn3+ cation.[1][2]
References
- ↑ 1.0 1.1 Jansen, M.; Hoppe, R. Zur Kenntnis der NaCl-Strukturfamilie Die Kristallstruktur von NaMnO2. Z. Anorg. Allg. Chem. 1973, 399 (2), 163–69. DOI: 10.1002/zaac.19733990204.
- ↑ 2.0 2.1 Hoppe, R.; Brachtel, G.; Jansen, M. Zur Kenntnis der Oxomanganate(III): Über LiMnO2 und β-NaMnO2. Z. Anorg. Allg. Chem. 1975, 417 (1), 1–10. DOI: 10.1002/zaac.19754170102.
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