Movatterモバイル変換

[0]ホーム
URL:

Jump to content
WikipediaThe Free Encyclopedia
Search

Caesium sesquioxide

From Wikipedia, the free encyclopedia
(Redirected fromCs2O3)
Caesium sesquioxide
Identifiers
3D model (JSmol)
  • InChI=1S/4Cs.2HO2.O2/c;;;;3*1-2/h;;;;2*1H;/q4*+1;;;-2/p-2
    Key: CBAPCGFDLAJQPQ-UHFFFAOYSA-L
  • [Cs+].[Cs+].[Cs+].[Cs+].[O-][O].[O-][O].[O-][O-]
Properties
Cs4O6
Molar mass627.616 g·mol−1
Appearanceblack powder[1]
Structure[1]
Pu2C3 structure type (body-centered cubic)
I43d (no. 220)
a = 984.6 pm
Related compounds
Othercations
Rubidium sesquioxide
Except where otherwise noted, data are given for materials in theirstandard state (at 25 °C [77 °F], 100 kPa).
Chemical compound

Caesium sesquioxide is achemical compound with theformulaCs2O3 or more accuratelyCs4O6. It is anoxide ofcaesium containingoxygen in differentoxidation states. It consists of caesiumcationsCs+,superoxideanionsO−2 andperoxide anionsO2−2. Caesium in this compound has an oxidation state of +1, while oxygen in superoxide has an oxidation state of −1/2 and oxygen in peroxide has an oxidation state of −1. This compound has a structural formula of(Cs+)4(O−2)2(O2−2).[1][2] Compared to the other caesium oxides, this phase is less well studied,[3] but has been long present in the literature.[4] It can be created by thermal decomposition ofcaesium superoxide at 290 °C.[5]

4 CsO2 → Cs4O6 + O2

The compound is often studied as an example of aVerwey typecharge ordering transition at low temperatures.[6][7][8] There were some theoretical suggestions thatCs4O6 would be a ferromagnetichalf metal,[9] but along with the closely relatedrubidium sesquioxide, experimental results found amagnetically frustrated system.[1] Below about 200 K, the structure changes to tetragonal symmetry.[10]Electron paramagnetic resonance andnuclear magnetic resonance measurements show a complicated low temperature magnetic behavior that depends on the orientation of the oxygen dimers andsuperexchange through the caesium atoms.[11]

References

[edit]
  1. ^abcdWinterlik, Jürgen; 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.
  2. ^"Chempendix - Oxidation States".
  3. ^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):12360–12367.doi:10.1021/jp036432o.ISSN 1520-6106.
  4. ^Helms, Alfred; Klemm, Wilhelm (1939-08-29). "Über die Kristallstrukturen der Rubidium- und Cäsiumsesquioxyde".Zeitschrift für anorganische und allgemeine Chemie (in German).242 (2). Wiley:201–214.doi:10.1002/zaac.19392420210.ISSN 0863-1786.
  5. ^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 für anorganische und allgemeine Chemie.643 (8). Wiley:544–547.doi:10.1002/zaac.201700013.ISSN 0044-2313.
  6. ^Max Planck Society (2018-01-19)."Charge order and electron localization in a molecule-based solid".Phys.org. Retrieved2021-11-26.
  7. ^Adler, Peter; Jeglič, Peter; Reehuis, Manfred; Geiß, Matthias; Merz, Patrick; Knaflič, Tilen; Komelj, Matej; Hoser, Andreas; Sans, Annette; Janek, Jürgen; Arčon, 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.
  8. ^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):14532–14541.doi:10.1021/acs.inorgchem.9b02122.ISSN 0020-1669.PMC 7880551.PMID 31633914.
  9. ^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.
  10. ^Okur, H. Esma; Colman, Ross H.; Ohishi, Yasuo; Sans, Annette; Felser, Claudia; Jansen, Martin; Prassides, Kosmas (2020-01-06). "Pressure-Induced Charge Disorder–Order Transition in the Cs4O6 Sesquioxide".Inorganic Chemistry.59 (2). American Chemical Society (ACS):1256–1264.doi:10.1021/acs.inorgchem.9b02974.ISSN 0020-1669.PMID 31904961.S2CID 210041198.
  11. ^Arčon, D.; Anderle, K.; Klanjšek, M.; Sans, A.; Mühle, 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.
Mixed oxidation states
+1 oxidation state
+2 oxidation state
+3 oxidation state
+4 oxidation state
+5 oxidation state
+6 oxidation state
+7 oxidation state
+8 oxidation state
Related
Oxides are sorted byoxidation state.Category:Oxides
Retrieved from "https://en.wikipedia.org/w/index.php?title=Caesium_sesquioxide&oldid=1256538634"
Categories:
Hidden categories:
[8]ページ先頭
©2009-2025 Movatter.jp