When a material forms a solid, the atoms align themselves in a special periodic structure called a crystal lattice. For example, in rock salt (NaCl), Na+ and Cl ions occupy the sites of a simple cubic (SC) lattice alternately as shown in Figure 1.1. In sodium (Na), Na+ ions form a body-centered cubic (BCC) lattice as shown in Figure 1.2. In solid Ar, neutral atoms form a face-centered cubic (FCC) lattice as shown in Figure 1.3.


Rock Salt Pauli Exclusion Principle Simple Harmonic Oscillator Simple Cubic Heisenberg Uncertainty Relation 
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© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  1. 1.Department of PhysicsUniversity at Buffalo, The State University of New YorkBuffaloUSA
  2. 2.Research DivisionThe National Center for University Entrance ExaminationsTokyoJapan

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