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It is shown that the s- and p-orbitals of the alkali atom valency electrons participate in the bond system of the alkali halogenides. The so-called ionic bond is merely an approximation. To prove this, the electron density distribution in LiF, the quadrupole and the superhyperfine electronnucleon interaction in Cr + -doted LiF, NaF and NaCl, and the influence of the s-orbitals on the superconducting properties of compounds containing alkali atoms are considered.

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Der Einfluß homöopolarer Bindungsanteile auf die Struktur anorganischer Salze IV. Salzartige Verbindungen / The Influence of Homopolar Bond Parts on the Structure of Inorganic Salts. IV. Salt-like Compounds.