Sesquioxide

Sesquioxide

Sesquioxide sind chemische Verbindungen, genauer Oxide, die ein Verhältnis des Metalls oder Halbmetalls zu Sauerstoff von 1 : 1,5 aufweisen (sesqui = „eineinhalbfach“).

Sesquioxide mit einer stöchiometrisch genauen Zusammensetzung haben daher die allgemeine Summenformel A2O3, wobei A die Oxidationszahl +III besitzt. Sesquioxide bilden zumeist kristalline Feststoffe.

Beispiele für Metallsesquioxide:

In natürlich gewachsenen Böden sind insbesondere Eisen(III)-oxid, Mangan(III)-oxid und Aluminiumoxid von Bedeutung. Der Begriff Sesquioxide steht daher in der Bodenkunde auch für diese drei Verbindungen.

Beispiele für Halbmetallsesquioxide:

Sesquioxide in der 1. Hauptgruppe:

  • Rb4O6 → [(Rb+)4(O22−)(O2)2][1]

Einzelnachweise

  1. Norman N. Greenwood, A. Earnshaw: Chemistry of the Elements. 2nd Edition, Butterworth-Heinemann, Oxford 1997, ISBN 0-7506-3365-4.

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  • Sesquioxide — Ses qui*ox ide, n. [Sesqui + oxide.] (Chem.) An oxide containing three atoms of oxygen with two atoms (or radicals) of some other substance; thus, alumina, {Al2O3} is a sesquioxide. [1913 Webster] …   The Collaborative International Dictionary of English

  • sesquioxide — [ses΄kwē äk′sīd΄] n. [ SESQUI + OXIDE] an oxide in which three atoms or equivalents of oxygen are combined with two of some other element or radical …   English World dictionary

  • Sesquioxide — A sesquioxide is an oxide containing three atoms of oxygen with two atoms (or radicals) of another element. For example, aluminium oxide (aluminium2oxygen3) is a sesquioxide. Many sesquioxides contain the metal in the +3 oxidation state and the… …   Wikipedia

  • sesquioxide — seskvioksidas statusas T sritis chemija formulė M₂O₃ atitikmenys: angl. sesquioxide rus. сесквиоксид …   Chemijos terminų aiškinamasis žodynas

  • sesquioxide — |seskwē+ noun Etymology: sesqui + oxide : an oxide containing three atoms of oxygen combined with two of the other constituent in the molecule ferric oxide is a sesquioxide …   Useful english dictionary

  • sesquioxide — /ses kwee ok suyd, sid/, n. Chem. an oxide containing three atoms of oxygen and two of another element, as aluminum oxide, Al2O3. [1825 35; SESQUI + OXIDE] * * * …   Universalium

  • sesquioxide — noun Any oxide containing three oxygen atoms for every two atoms of another element …   Wiktionary

  • sesquioxide —   the oxides of iron and aluminium that occur in soils …   Geography glossary

  • sesquioxide — ses·qui·ox·ide .ses kwē äk .sīd n an oxide containing three atoms of oxygen combined with two of the other constituent in the molecule * * * ses·qui·ox·ide (ses″kwe okґsid) a compound of three parts of oxygen with two of another element …   Medical dictionary

  • sesquioxide — ses·qui·oxide …   English syllables

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