Difference between revisions of "Lithium manganite"
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LiMn<sub>2</sub>O<sub>4</sub> contains both manganese(III) and manganese(IV). It adopts a [[Spinel structure|spinel-type]] structure.<ref>{{citation | first1 = Young-Sik | last1 = Hong | first2 = Hyu-Bum | last2 = Park | first3 = Ji-Eun | last3 = Yi | first4 = Chi-Hwan | last4 = Han | first5 = Si-Joong | last5 = Kim | title = Characterization of Spinel Lithium Manganite Prepared by Citrate Sol-Gel Merthod | journal = Bull. Korean Chem. Soc. | volume = 18 | issue = 11 | year = 1997 | pages = 1153–58 | url = http://pdf.easechem.com/pdf/32/d27d3506-99cd-4b7f-aec8-a5868d8e100b.pdf}}.</ref> | LiMn<sub>2</sub>O<sub>4</sub> contains both manganese(III) and manganese(IV). It adopts a [[Spinel structure|spinel-type]] structure.<ref>{{citation | first1 = Young-Sik | last1 = Hong | first2 = Hyu-Bum | last2 = Park | first3 = Ji-Eun | last3 = Yi | first4 = Chi-Hwan | last4 = Han | first5 = Si-Joong | last5 = Kim | title = Characterization of Spinel Lithium Manganite Prepared by Citrate Sol-Gel Merthod | journal = Bull. Korean Chem. Soc. | volume = 18 | issue = 11 | year = 1997 | pages = 1153–58 | url = http://pdf.easechem.com/pdf/32/d27d3506-99cd-4b7f-aec8-a5868d8e100b.pdf}}.</ref> | ||
| − | Li<sub>2</sub>MnO<sub>3</sub> is a manganese(IV) compound: it has been investicated as an electrode material in molten carbonate fuel cells.<ref>{{citation | title = Lithium manganite development as a molten carbonate fuel cell cathode | last1 = Smith | first1 = J. L. | last2 = Kucera | first2 = G. H. | last3 = Brown | first3 = A. P. | year = 1991 | id = EPRI-GS-7288 | publisher = Electric Power Research Institute | location = Palo Alto, CA}}.</ref> | + | Li<sub>2</sub>MnO<sub>3</sub> is a manganese(IV) compound: it has been investicated as an electrode material in molten carbonate fuel cells.<ref>{{citation | title = Lithium manganite development as a molten carbonate fuel cell cathode | last1 = Smith | first1 = J. L. | last2 = Kucera | first2 = G. H. | last3 = Brown | first3 = A. P. | year = 1991 | id = EPRI-GS-7288 | publisher = Electric Power Research Institute | location = Palo Alto, CA | url = http://www.osti.gov/energycitations/product.biblio.jsp?osti_id=5739101}}.</ref> |
==References== | ==References== | ||
Revision as of 15:18, 26 June 2010
| 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, <http://www.osti.gov/energycitations/product.biblio.jsp?osti_id=5739101>.
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