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- W4247156958 abstract "This chapter outlines mixed-valence halides, which have been investigated for their spectroscopic and in some cases for magnetic properties. At normal temperature and pressure, 17 of the 20 alkali halides, together with the silver halides AgCl and AgBr, crystallize with 6:6 coordination in the face-centered-cubic rocksalt structure. The countermotion of the ions of opposite charge in halides leads to strong infrared absorption associated with optical phonons. The large electronic bandgap in halides, which renders them optically transparent, makes them ideal hosts for various impurity ions whose optically excited electronic transitions are easily studied by optical spectroscopy in the visible region and impart coloration to the host solid. A property that distinguishes halides from most other inorganic solids is extreme sensitivity to ionizing or near-ionizing radiation. The elastic properties of halides are determined by the long wavelength acoustic phonon mode properties. Halides, in common with most ceramic materials, are brittle as well as plastic, and many halides exhibit well-defined cleavage on prominent crystallographic planes as the principal mode of crack propagation under an applied tensile stress." @default.
- W4247156958 created "2022-05-12" @default.
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- W4247156958 date "1991-01-01" @default.
- W4247156958 modified "2023-10-16" @default.
- W4247156958 title "Halides" @default.
- W4247156958 doi "https://doi.org/10.1016/b978-0-08-034720-2.50058-7" @default.
- W4247156958 hasPublicationYear "1991" @default.
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