ionicityn.
/ˌʌɪəˈnɪsᵻti/, U.S. /ˌaɪəˈnɪsᵻdi/ Chemistry.
The ionic character of a bond, molecule, etc.; the degree to which something is ionic.
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the world > matter > chemistry > chemical bonding > [noun] > polar bonding > electrovalent or ionic bond > ionic character
ionicity1936
1936 Proc. Royal Soc. A. 156 686 Further experimental work on the ion in solution and in crystals of varying ‘ionicity’ are highly desirable.
1946 Nature 26 Oct. 592/2 The absence..can be satisfactorily explained in terms of the increased ionicity of the CO bond in ethyl alcohol relative to CO in methyl alcohol.
1952 C. A. Coulson Valence v. 123 The asymmetry of charge, i.e. the polar character of the bond, sometimes called the degree of ionicity.
1980 Adv. in Electronics & Electron Physics 51 52 GaAs and AlAs have similar ionicities and the same crystal structure.
2009 T. E. Fischer Materials Sci. for Engin. Students i. 20 The most ionic bond is that of cesium fluoride, with an iconicity of 95%.
This entry has been updated (OED Third Edition, March 2012; most recently modified version published online March 2022).
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