제일원리 계산 시뮬레이션 레포트
- 최초 등록일
- 2014.03.28
- 최종 저작일
- 2012.09
- 7페이지/
MS 워드
- 가격 1,000원
![할인쿠폰받기](/images/v4/document/ico_det_coupon.gif)
목차
없음
본문내용
All matter is composed of atoms. In physics, a molecule is the smallest substance which has intrinsic material properties. Periodically and regularly coordinated atomic composition builds molecule system, and crystal system is made up three dimensionally stacked molecules which is basis of crystal lattice; these arrangements can be represented by a repeat unit or motif called the unit cell. The unit cell is defined as the smallest repeating unit which shows the full symmetry of the crystal structure. In other words, we can describe width, length, and height of the unit cell three dimensionally, so lattice constant, or lattice parameter, is the reference of the constant distance between unit cells in a crystal lattice. In three dimensions unit cell system, lattices generally have three constants, referred to as a, b, c. Easily, in the case of cubic crystal structures, all of the constants are equal and we only refer to a. However, the full set of lattice parameters consist of the three lattice constants and the three angles between them.
<중 략>
In case of Cobalt, we have to use another primitive cell for hexagonal close packed lattice structure. In hexagonal close packed (HCP) lattice system, we can use primitive vectors and basis vector which means HCP structure made by repetition of crystal translation operations. The followings are the primitive vectors and basis vector of HCP structure.
참고 자료
없음