標題: Intermediate-Valence Ytterbium Compound Yb4Ga24Pt9: Synthesis, Crystal Structure, and Physical Properties
作者: Sichevych, Olga
Prots, Yurii
Utsumi, Yuki
Akselrud, Lev
Schmidt, Marcus
Burkhardt, Ulrich
Coduri, Mauro
Schnelle, Walter
Bobnar, Matej
Wang, Yu-Ting
Wu, Yu-Han
Tsuei, Ku-Ding
Tjeng, Liu Hao
Grin, Yuri
電子物理學系
Department of Electrophysics
公開日期: 7-八月-2017
摘要: The title compound was synthesized by a reaction of the elemental educts in a corundum crucible at 1200 degrees C under an Ar atmosphere. The excess of Ga used in the initial mixture served as a flux for the subsequent crystal growth at 600 degrees C. The crystal structure of Yb4Ga24Pt9 was determined from single-crystal X-ray diffraction data: new prototype of crystal structure, space group C2/m, Pearson symbol mS74, a = 7.4809(1) angstrom, b = 12.9546(2) angstrom, c = 13.2479(2) angstrom, beta = 100.879(1)degrees, V = 1260.82(6) angstrom(3), R-F = 0.039 for 1781 observed reflections and 107 variable parameters. The structure is described as an ABABB stacking of two slabs with trigonal symmetry and compositions Yb4Ga6 (A) and Ga12Pt6 (B). The hard. X-ray photoelectron spectrum (HAXPES) of Yb4Ga24Pt9 shows both Yb2+ and Yb3+ contributions as evidence of an intermediate valence state of ytterbium The evaluated Yb valence of similar to 2.5 is in good agreement with the results obtained from the magnetic susceptibility measurements. The compound is, a bad metallic conductor.
URI: http://dx.doi.org/10.1021/acs.inorgchem.7b01530
http://hdl.handle.net/11536/145898
ISSN: 0020-1669
DOI: 10.1021/acs.inorgchem.7b01530
期刊: INORGANIC CHEMISTRY
Volume: 56
起始頁: 9343
結束頁: 9352
顯示於類別:期刊論文