abs

학술발표회초록보기

초록문의 abstract@kcsnet.or.kr

결제문의 member@kcsnet.or.kr

현재 가능한 작업은 아래와 같습니다.
  • 09월 12일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제110회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Effect of Li-Substitution on the Metal-Rich RE5Tt4 Family: Site-Preference and Crystal Structure of Er4LiGe4

등록일
2012년 9월 5일 15시 40분 32초
접수번호
1710
발표코드
INOR.P-349 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
10월 17일 (수요일) 16:00~19:00
발표형식
포스터
발표분야
무기화학
저자 및
공동저자
남근우, 전지은1, 유태수1
충북대학교 화학부 화학과, Korea
1충북대학교 화학과, Korea
A new member of theRE5Tt4 family (RE = rare-earth metals, Tt = tetrels), Er4LiGe4 has been synthesized and characterized using powder and single crystal X-ray diffractions. The title compound crystallized in the orthorhombic space group Pnma (Pearson code oP36, Z = 4) and adopted the Gd5Si4-type structure, where all interlayer Ge-Ge distances fall within the range of the single-bonded dimer distance. The lattice parameters are observed as follows: a = 7.04(4) angstrom, b = 14.52(8) angstrom, and c = 7.62(5) angstrom. There exist six crystallographically unique asymmetric sites including two Er-sites, one Li-site and three Ge-sites. The overall crystal structure of Er4LiGe4 consists of two basic components: (1) the flat layered structure of the Er2LiGe2 slab adopting the Mo2FeB2-type structure and (2) Ge2 dimers connecting two such layered structures. A Li atom on the Er2LiGe2 slab is primarily surrounded by eight Er atoms forming a distorted cubic coordination environment, and then it is further connected to six Ge atoms shaping a slightly distorted octahedral coordinates. The particular site-preference of Li atoms is also investigated using the coloring problem based on the theoretical approach by TB-LMTO method.

상단으로