2011年2月
Planar Symmetry Incompatibility in Ru-Sn-Zn Pseudo-Decagonal Approximants Composed of Novel Pentagonal Antiprisms
INORGANIC CHEMISTRY
- ,
- ,
- 巻
- 50
- 号
- 3
- 開始ページ
- 827
- 終了ページ
- 835
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1021/ic101720m
- 出版者・発行元
- AMER CHEMICAL SOC
Two new ternary compounds in the Ru-Sn-Zn system were synthesized by conventional high-temperature reactions, and their crystal structures were analyzed by means of the single crystal X-ray diffraction: Ru2Sn2Zn3 (orthorhombic, Pnma, Pearson symbol oP28, a = 8.2219(16), b = 4.1925(8), c = 13.625(3) angstrom, V=469.66(16) angstrom(3), Z = 4) and Ru4.15Sn4.96Zn5.85 (orthorhombic, Pnma, Pearson symbol oP60-delta, a = 8.3394(17), b = 4.2914(9), c = 28.864(6) angstrom, V = 1032.98(40) angstrom(3), Z = 4). With the increase in the Sn content, the half-decagon structure unit with a triangle center in Ru2Sn2Zn3 grows up to a symmetry incompatible decagonal unit with a central triangle in the common plane in Ru4.15Sn4.96Zn5.85. Both structures can be described by hexagonal arrays of Sn-centered novel pentagonal antiprisms. In light of their pseudodecagonal diffraction in the h0l section and point group mmm, both phases are considered as new quasicrystal approximants in the Ru-Zn Sn ternary system. The temperature dependences of the electrical resistivity for both compounds exhibit metallic behavior, but their Seebeck coefficients are of opposite sign.
- リンク情報
- ID情報
-
- DOI : 10.1021/ic101720m
- ISSN : 0020-1669
- eISSN : 1520-510X
- Web of Science ID : WOS:000286688700021