Lithium manganite
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| Lithium manganite | |
|---|---|
| IUPAC name | lithium manganese dioxide |
| Properties | |
| Chemical formula | LiMnO2 |
| Molar mass | 93.878 g mol−1 |
| Structure[1] | |
| Crystal structure | Distorted halite (NaCl) |
| Space group | Pmnm |
| Lattice constant | a = 280(5) pm, b = 575(7) pm, c = 457(2) pm |
| Coordination geometry | Distorted octahedral (Li+, Mn3+) Distorted octahedral (O2−) |
| Related compounds | |
| Other anions | Lithium manganate Lithium permanganate |
| Other cations | Sodium manganite Potassium manganite |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) | |
Lithium manganite can refer to any of several mixed oxides of lithium and manganese.
LiMnO2 is a mixed oxide of lithium and manganese(III). It adopts a distorted halite (NaCl) structure, with the MnO6 octahedra being distorted by the Jahn–Teller effect of the d4 Mn3+ cation.[1]
LiMn2O4 contains both manganese(III) and manganese(IV). It adopts a spinel-type structure.[2]
Li2MnO3 is a manganese(IV) compound: it has been investicated as an electrode material in molten carbonate fuel cells.[3]
References
- ↑ 1.0 1.1 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.
- ↑ Hong, Young-Sik; Park, Hyu-Bum; Yi, Ji-Eun; Han, Chi-Hwan; Kim, Si-Joong Characterization of Spinel Lithium Manganite Prepared by Citrate Sol-Gel Merthod. Bull. Korean Chem. Soc. 1997, 18 (11), 1153–58, <http://pdf.easechem.com/pdf/32/d27d3506-99cd-4b7f-aec8-a5868d8e100b.pdf>.
- ↑ Smith, J. L.; Kucera, G. H.; Brown, A. P. Lithium manganite development as a molten carbonate fuel cell cathode; Electric Power Research Institute: Palo Alto, CA, 1991. EPRI-GS-7288.
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