材料科學(xué)基礎(chǔ)(清華大學(xué))-在線瀏覽
2025-05-09 04:15本頁面
【正文】 range order (～ 1nm).252。Polycrystalline: grain boundariesuⅡ. Space lattice1. Definition: Space lattice consists of an array of regularly arranged geometrical points, called lattice points. The (periodic) arrangement of these points describes the regularity of the arrangement of atoms in crystals.2. Two basic features of lattice points①① Periodicity: Arranged in a periodic pattern.②② Identity: The surroundings of each point in the lattice are identical. A lattice may be one , two, or three dimensionaltwo dimensionsSpace lattice is a point array which represents the regularity of atom arrangements (1) (2) (3) a bThree dimensions Each lattice point has identical surrounding environmentuⅢ. Unit cell and lattice constants?Unit cell is the smallest unit of the lattice. The whole lattice can be obtained by infinitive repetition of the unit cell along
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