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heteropolar crystal

См. также в других словарях:

  • symmetry — /sim i tree/, n., pl. symmetries. 1. the correspondence in size, form, and arrangement of parts on opposite sides of a plane, line, or point; regularity of form or arrangement in terms of like, reciprocal, or corresponding parts. 2. the proper or …   Universalium

  • Madelung constant — The Madelung constant is used in determining the energy of a single ion in a crystal. It is named after Erwin Madelung, a German physicist. [E. Madelung, Phys. Zs. 19, (1918), 542] Because the anions and cations in an ionic solid are attracted to …   Wikipedia

  • Lattice energy — Sodium chloride crystal lattice The lattice energy of an ionic solid is a measure of the strength of bonds in that ionic compound. It is usually defined as the enthalpy of formation of the ionic compound from gaseous ions and as such is… …   Wikipedia

  • bond — In chemistry, the force holding two neighboring atoms in place and resisting their separation; a b. is electrovalent if it consists of the attraction between oppositely charged groups, or covalent if it results from the sharing of one, two, or… …   Medical dictionary

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