The bond valence model is a version of the ionic model in which the chemical constraints are expressed in terms of localized chemical bonds formed by the valence charge of the atoms. Theorems derived from the properties of the electrostatic flux predict the rules obeyed by both ionic and covalent bonds. They make quantitative predictions of coordination number, crystal structure, bond lengths and bond angles. Bond stability depends on the matching of the bonding strengths of the atoms, while the conflicting requirements of chemistry and space lead to the structural instabilities responsible fo ... More
Keywords: bond valence, flux, covalent, ionic, crystal structure
Print publication date: 2016 | Print ISBN-13: 9780198742951 |
Published to Oxford Scholarship Online: November 2016 | DOI:10.1093/acprof:oso/9780198742951.001.0001 |