title: A classification of covalent, ionic, and metallic solids based on the electron density.
abstract: The electron density of crystals contains all of the information required to complete a classification of their bonding types. We propose here a set of three different indexes, flatness, charge transfer, and molecularity, easily obtained from the experimental or theoretical electron density, which give rise to a classification in close resemblance to the classical van Arkel-Ketelaar diagrams.
authors.affiliation: Department of Chemistry, Duke University, Box 90354, Durham, North Carolina 27708-0354, USA.
authors.forename: Paula
authors.initials: P
authors.lastname: Mori-Sánchez
authors.forename: A Martín
authors.initials: AM
authors.lastname: Pendás
authors.forename: Víctor
authors.initials: V
authors.lastname: Luaña