"Madelung-Konstante"@de . "For a uni-univalent ionic crystal of specified structure, the binding energy \\(V_b\\) per pair of ions is \\(V_b = \\alpha\\frac{e^2}{4\\pi \\varepsilon_0 a}\\), where \\(e\\) is the elementary charge, \\(\\varepsilon_0\\) is the electric constant, and \\(a\\) is the lattice constant which should be specified."^^ . "Madelung constant"@en . "Constante de Madelung"@fr . "Constante de Madelung"@es . "http://en.wikipedia.org/wiki/Madelung_constant"^^ . "constante de Madelung"@pt . "\u99AC\u5FB7\u9686\u5E38\u6578"@zh . "Costante di Madelung"@it . "\u062B\u0627\u0628\u062A \u0645\u0627\u062F\u0644\u0648\u0646\u06AF"@fa . "\\(\\alpha\\)"^^ . "\u062B\u0627\u0628\u062A \u0645\u0627\u062F\u0644\u0648\u0646\u0643"@ar . . "\u30DE\u30FC\u30C7\u30EB\u30F3\u30B0\u30A8\u30CD\u30EB\u30AE\u30FC"@ja . . "http://www.iso.org/iso/catalogue_detail?csnumber=31897"^^ . "Sta\u0142a Madelunga"@pl . "\"Madelung Constant\" is used in determining the electrostatic potential of a single ion in a crystal by approximating the ions by point charges. It is named after Erwin Madelung, a German physicist." . "\u043F\u043E\u0441\u0442\u043E\u044F\u043D\u043D\u0430\u044F \u041C\u0430\u0434\u0435\u043B\u0443\u043D\u0433\u0430"@ru . . .