[공대]결정구조(Ⅰ. Lattice Geometry)
- 최초 등록일
- 2006.09.11
- 최종 저작일
- 2006.08
- 5페이지/ 한컴오피스
- 가격 1,000원
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목차
1. Introduction (Overview)
2. Two-dimensional Symmetry
a) Lattice, unit cell
b) Symmetry Operations
c) 2-dimentional point group(10)
본문내용
1. Introduction (Overview)
∎ Crystals(結晶) : an anisotropic body consisting of a three-dimensional
periodic arrangement of atoms, irons or molecules.
↔ amorphous(glass state)
- isotopic : equal physical properties in all direction.
2 1
2
∎ Characteristics
1) regular geometric shape : consisting of polyhedral faces that express
an internal structure, manifested by symmetry operation of atoms and
molecules.
2) anisotropic physical properties bright yellow
- pleochroism "cordierite"
- hardness blue
- cleavage-bond strength blue grey
3) defects are involved in atomic arrangement : there defects determine
the major physical, mechanical and electronic properties of materials
참고 자료
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