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Date: 17-5-2017
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Date: 20-5-2017
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Date: 24-5-2016
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IMPERFECTIONS AND IMPURITIES IN SOLIDS
Up to this point, we have been considering an ideal single-crystal structure. In areal crystal, the lattice is not perfect, but contains imperfections or defects; that is, the perfect geometric periodicity is disrupted in some manner. Imperfections tend to alter the electrical properties of a material and, in some cases, electrical parameters can be dominated by these defects or impurities.
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10 دقائق قبل النوم.. هذا الأسلوب يساهم في تحسين يومك
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الأسباب الشائعة لتفريغ شحن البطارية
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الهيأة العليا لإحياء التراث تطلق العام الدراسي لطلبة المعهد العالي للتراث
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