View : 42 Download: 0

Yb5In2Sb6: A new rare earth zintl phase with a narrow band cap

Title
Yb5In2Sb6: A new rare earth zintl phase with a narrow band cap
Authors
Kim, SJIreland, JRKannewurf, CRKanatzidis, MG
Ewha Authors
김성진
SCOPUS Author ID
김성진scopus
Issue Date
2000
Journal Title
JOURNAL OF SOLID STATE CHEMISTRY
ISSN
0022-4596JCR Link
Citation
vol. 155, no. 1, pp. 55 - 61
Publisher
ACADEMIC PRESS INC
Indexed
SCI; SCIE; SCOPUS WOS
Abstract
The new Zintl phase Yb5In2Sb6 was obtained from a direct element combination reaction in a sealed graphite tube at 700 degreesC and its structure was determined. It crystallizes in the orthorhombic space group Pbam (No. 55), in the Ba5Al2Bi6 structure type, with a unit cell of a = 7.3992(5) Angstrom, b = 23.001(6) Angstrom, c = 4.5139(4) Angstrom, and Z = 2, Yb5In2Sb6 has a one-dimensional structure with infinite anionic double chains (In2Sb6)(10-) separated by Yb2+ ions. Each single chain is made of corner-sharing InSb4 tetrahedra. Two such chains are bridged by Sb-2 groups to form double chains 1/infinity [In2Sb610-]. The compound satisfies the classical Zintl concept and is a narrow gap semiconductor. Band structure calculations suggest an direct band gap. Polycrystalline ingots of Yb5In2Sb6 showed electrical conductivity of 100 S/cm and a Seebeck coefficient of similar to +30 mu V/K at room temperature. The thermal conductivity of Yb5In2Sb6, is about 1.7 W/mK in the temperature range of 150-300 K. (C) 2000 Academic Press.
DOI
10.1006/jssc.2000.8891
Appears in Collections:
자연과학대학 > 화학·나노과학전공 > Journal papers
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE