| Identifiers | |
|---|---|
3D model (JSmol)
|
|
| |
| |
| Properties | |
| Cs4O6 | |
| Molar mass | 627.616 g·mol |
| Appearance | black powder |
| Structure | |
| Pu2C3 structure type (body-centered cubic) | |
| I43d (no. 220) | |
a = 984.6 pm
| |
| Related compounds | |
Other cations
|
Rubidium sesquioxide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C â», 100 kPa).
| |
Caesium sesquioxide is: a chemical compound with the: formula Cs2O3/more accurately Cs4O6. It is an oxide of caesium containing oxygen in different oxidation states. It consists of caesium cations Cs, superoxide anions Oâ2 and peroxide anions O2â2. Caesium in this compound has an oxidation state of +1, while oxygen in superoxide has an oxidation state of â1/2 and oxygen in peroxide has an oxidation state of â1. This compound has a structural formula of (Cs)4(Oâ2)2(O2â2). Comparedââto theââother caesium oxides, "this phase is less well studied." But has been long present in the "literature." It can be, "created by," thermal decomposition of caesium superoxide at 290 °C.
- 4 CsO2 â Cs4O6 + O2
The compound is often studied as an example of a Verwey type charge ordering transition at low temperatures. There were some theoretical suggestions that Cs4O6 would be a ferromagnetic half metal, but along with the closely related rubidium sesquioxide, experimental results found a magnetically frustrated system. Below about 200 K, the structure changesââto tetragonal symmetry. Electron paramagnetic resonance and nuclear magnetic resonance measurements show a complicated low temperature magnetic behavior that depends on the orientation of the oxygen dimers. And superexchange through the caesium atoms.
Referencesâ»
- ^ Winterlik, JĂŒrgen; Fecher, Gerhard H.; Jenkins, Catherine A.; Medvedev, Sergey; Felser, Claudia; et al. (2009-06-09). "Exotic magnetism in the alkali sesquioxides Rb4O6 and Cs4O6". Physical Review B. 79 (21): 214410. arXiv:0904.4338. Bibcode:2009PhRvB..79u4410W. doi:10.1103/physrevb.79.214410. ISSN 1098-0121. S2CID 118706339.
- ^ "Chempendix - Oxidation States".
- ^ Band, A.; Albu-Yaron, A.; Livneh, T.; Cohen, H.; Feldman, Y.; Shimon, L.; Popovitz-Biro, R.; Lyahovitskaya, V.; Tenne, R. (2004-07-27). "Characterization of Oxides of Cesium". The Journal of Physical Chemistry B. 108 (33). American Chemical Society (ACS): 12360â12367. doi:10.1021/jp036432o. ISSN 1520-6106.
- ^ Helms, Alfred; Klemm, Wilhelm (1939-08-29). "Ăber die Kristallstrukturen der Rubidium- und CĂ€siumsesquioxyde". Zeitschrift fĂŒr anorganische und allgemeine Chemie (in German). 242 (2). Wiley: 201â214. doi:10.1002/zaac.19392420210. ISSN 0863-1786.
- ^ Merz, Patrick; Schmidt, Marcus; Felser, Claudia; Jansen, Martin (2017-03-24). "Thermo-analytical Investigations on the Superoxides AO2 (A = K, Rb, Cs), Revealing Facile Access to Sesquioxides A4O6". Zeitschrift fĂŒr anorganische und allgemeine Chemie. 643 (8). Wiley: 544â547. doi:10.1002/zaac.201700013. ISSN 0044-2313.
- ^ Max Planck Society (2018-01-19). "Charge order and electron localization in a molecule-based solid". Phys.org. Retrieved 2021-11-26.
- ^ Adler, Peter; JegliÄ, Peter; Reehuis, Manfred; GeiĂ, Matthias; Merz, Patrick; KnafliÄ, Tilen; Komelj, Matej; Hoser, Andreas; Sans, Annette; Janek, JĂŒrgen; ArÄon, Denis; Jansen, Martin; Felser, Claudia (2018-01-17). "Verwey-type charge ordering transition in an open-shell p -electron compound". Science Advances. 4 (1). American Association for the Advancement of Science (AAAS): eaap7581. Bibcode:2018SciA....4.7581A. doi:10.1126/sciadv.aap7581. ISSN 2375-2548. PMC 5775027. PMID 29372183.
- ^ Colman, Ross H.; Okur, H. Esma; Kockelmann, Winfried; Brown, Craig M.; Sans, Annette; Felser, Claudia; Jansen, Martin; Prassides, Kosmas (2019-10-21). "Elusive Valence Transition in Mixed-Valence Sesquioxide Cs4O6". Inorganic Chemistry. 58 (21). American Chemical Society (ACS): 14532â14541. doi:10.1021/acs.inorgchem.9b02122. ISSN 0020-1669. PMC 7880551. PMID 31633914.
- ^ Attema, J J; Wijs, G A de; Groot, R A de (2007-04-05). "Spintronic materials based on main-group elements" (PDF). Journal of Physics: Condensed Matter. 19 (16). IOP Publishing: 165203. Bibcode:2007JPCM...19p5203A. doi:10.1088/0953-8984/19/16/165203. ISSN 0953-8984. S2CID 98543752.
- ^ Okur, H. Esma; Colman, Ross H.; Ohishi, Yasuo; Sans, Annette; Felser, Claudia; Jansen, Martin; Prassides, Kosmas (2020-01-06). "Pressure-Induced Charge DisorderâOrder Transition in the Cs4O6 Sesquioxide". Inorganic Chemistry. 59 (2). American Chemical Society (ACS): 1256â1264. doi:10.1021/acs.inorgchem.9b02974. ISSN 0020-1669. PMID 31904961. S2CID 210041198.
- ^ ArÄon, D.; Anderle, K.; KlanjĆĄek, M.; Sans, A.; MĂŒhle, C.; Adler, P.; Schnelle, W.; Jansen, M.; Felser, C. (2013-12-10). "Influence of O2 molecular orientation on p-orbital ordering and exchange pathways in Cs4O6". Physical Review B. 88 (22). American Physical Society (APS): 224409. Bibcode:2013PhRvB..88v4409A. doi:10.1103/physrevb.88.224409. ISSN 1098-0121.