Section 4.Simple Crystal Structures (1)Sodium Chloride Structure Key points:Be familiar with the Sodium Chloride Structure.Know how to figure out the corresponding lattice structure,primitive cells,basis,and lattice type. (2)Cesium Chloride Structure Key points:Be familiar with the Cesium Chloride Structure.Know how to figure ou the corresponding lattice structure,primitive cells,basis,and lattice type. (3)Hexagonal Close-Packed Structure(hep) Key points:Understand the meaning of Close-Packed Structures'.Be familiar with the difference between hep and fec structures (4)Diamond Structure Key points:Be familiar with the Diamond Structure.Know how to figure out the corresponding lattice structure,primitive cells,basis,and lattice type. (5)CubicZinc Sulfide Structure Key points:Be familiar with the Cubic Zinc Sulfide Structure.Know how to figure out the corresponding lattice structure,primitive cells,basis,and lattice type. 4.Teaching method self-directed 5.Evaluation Via homework assignments,thinking questions in class,quizzes Chapter 2 Wave Diffraction and the Reciprocal Lattice 1.Teaching Aim In this chapter students study the wave diffraction of crystal lattice and the concept of reciprocal attice.to be familiar with the experiments of -ray diffraction by crystals.Master the Bragg Law and Equationas well as LaueEquationo Formulation Understand the equivalence of Bragg's and Laue's views of the X-ray diffraction in crystals. Understand the reason and the background for the introduction of reciprocal lattice.Master the relations between the direct and the reciprocal lattices. 2.Difficult Points Establish aclear and full picture of crystal structure,crystal (direct)lattice,and reciprocal lattice. Section 4. Simple Crystal Structures (1) Sodium Chloride Structure Key points: Be familiar with the Sodium Chloride Structure. Know how to figure out the corresponding lattice structure, primitive cells, basis, and lattice type. (2) Cesium Chloride Structure Key points: Be familiar with the Cesium Chloride Structure. Know how to figure out the corresponding lattice structure, primitive cells, basis, and lattice type. (3) Hexagonal Close-Packed Structure (hcp) Key points: Understand the meaning of ‘Close-Packed Structures’. Be familiar with the difference between hcp and fcc structures. (4) Diamond Structure Key points: Be familiar with the Diamond Structure. Know how to figure out the corresponding lattice structure, primitive cells, basis, and lattice type. (5) Cubic Zinc Sulfide Structure Key points: Be familiar with the Cubic Zinc Sulfide Structure. Know how to figure out the corresponding lattice structure, primitive cells, basis, and lattice type. 4. Teaching method PPT lectures, Handwritten derivation in class, discussion in class, tutorial after class, self-directed learning. 5. Evaluation Via homework assignments, thinking questions in class, quizzes. Chapter 2 Wave Diffraction and the Reciprocal Lattice 1. Teaching Aim In this chapter students study the wave diffraction of crystal lattice and the concept of reciprocal lattice. Students are required to be familiar with the experiments of X-ray diffraction by crystals. Master the Bragg Law and Equation as well as Laue Equation or Formulation. Understand the equivalence of Bragg’s and Laue’s views of the X-ray diffraction in crystals. Understand the reason and the background for the introduction of reciprocal lattice. Master the relations between the direct and the reciprocal lattices. 2. Difficult Points Establish a clear and full picture of crystal structure, crystal (direct) lattice, and reciprocal lattice