Formation of an Intermediate Valence Icosahedral Quasicrystal in the Au-Sn-Yb System

Tsunetomo Yamada; Yoko Nakamura; Tetsu Watanuki; Akihiko MacHida; Masaichiro Mizumaki; Kiyofumi Nitta; Akira Sato; Yoshitaka Matsushita; An Pang Tsai

doi:10.1021/acs.inorgchem.9b00801

Formation of an Intermediate Valence Icosahedral Quasicrystal in the Au-Sn-Yb System

Tsunetomo Yamada, Yoko Nakamura, Tetsu Watanuki, Akihiko MacHida, Masaichiro Mizumaki, Kiyofumi Nitta, Akira Sato, Yoshitaka Matsushita, An Pang Tsai

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Abstract

We report on the formation of a new icosahedral quasicrystal (iQC) in the Au-Sn-Yb alloy system. This iQC has a primitive icosahedral lattice with a lattice constant a_ico of 0.5447(7) nm and a composition that was determined to be Au_60.0Sn_26.7Yb_13.3. X-ray absorption spectroscopy measurement of the near Yb L₃ edge demonstrates that the Yb valence in the iQC is an intermediate valence between divalent (4f¹⁴) and trivalent (4f¹³) at ambient pressure and was determined to be 2.18+. The results are compared to those for a corresponding 2/1 cubic approximant crystal. The formation of this new iQC is discussed in terms of the atomic size factor (δ) and the valence electron-to-atom ratio (e/a).

Original language	English
Pages (from-to)	9181-9186
Number of pages	6
Journal	Inorganic chemistry
Volume	58
Issue number	14
DOIs	https://doi.org/10.1021/acs.inorgchem.9b00801
Publication status	Published - 2019 Jul 15

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Inorganic Chemistry

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10.1021/acs.inorgchem.9b00801

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title = "Formation of an Intermediate Valence Icosahedral Quasicrystal in the Au-Sn-Yb System",

abstract = "We report on the formation of a new icosahedral quasicrystal (iQC) in the Au-Sn-Yb alloy system. This iQC has a primitive icosahedral lattice with a lattice constant aico of 0.5447(7) nm and a composition that was determined to be Au60.0Sn26.7Yb13.3. X-ray absorption spectroscopy measurement of the near Yb L3 edge demonstrates that the Yb valence in the iQC is an intermediate valence between divalent (4f14) and trivalent (4f13) at ambient pressure and was determined to be 2.18+. The results are compared to those for a corresponding 2/1 cubic approximant crystal. The formation of this new iQC is discussed in terms of the atomic size factor (δ) and the valence electron-to-atom ratio (e/a).",

author = "Tsunetomo Yamada and Yoko Nakamura and Tetsu Watanuki and Akihiko MacHida and Masaichiro Mizumaki and Kiyofumi Nitta and Akira Sato and Yoshitaka Matsushita and Tsai, {An Pang}",

note = "Funding Information: This research was partially supported by JSPS KAKENHI Grants JP15K05193 and JP18K13987. Y.N. thanks M. de Boissieu for stimulating discussions during her stay in SIMaP. The XANES experiments at SPring-8 were performed with approval of the Japan Synchrotron Radiation Research Institute (JASRI) (Proposals 2013A3701, 2013B1183, and 2014A3701). A.-P.T. acknowledge support from the “Dynamic Alliance for Open Innovation Bridging Human, Environment and Materials”. Publisher Copyright: {\textcopyright} 2019 American Chemical Society.",

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AU - Yamada, Tsunetomo

AU - Nakamura, Yoko

AU - Watanuki, Tetsu

AU - MacHida, Akihiko

AU - Mizumaki, Masaichiro

AU - Nitta, Kiyofumi

AU - Sato, Akira

AU - Matsushita, Yoshitaka

AU - Tsai, An Pang

N1 - Funding Information: This research was partially supported by JSPS KAKENHI Grants JP15K05193 and JP18K13987. Y.N. thanks M. de Boissieu for stimulating discussions during her stay in SIMaP. The XANES experiments at SPring-8 were performed with approval of the Japan Synchrotron Radiation Research Institute (JASRI) (Proposals 2013A3701, 2013B1183, and 2014A3701). A.-P.T. acknowledge support from the “Dynamic Alliance for Open Innovation Bridging Human, Environment and Materials”. Publisher Copyright: © 2019 American Chemical Society.

PY - 2019/7/15

Y1 - 2019/7/15

N2 - We report on the formation of a new icosahedral quasicrystal (iQC) in the Au-Sn-Yb alloy system. This iQC has a primitive icosahedral lattice with a lattice constant aico of 0.5447(7) nm and a composition that was determined to be Au60.0Sn26.7Yb13.3. X-ray absorption spectroscopy measurement of the near Yb L3 edge demonstrates that the Yb valence in the iQC is an intermediate valence between divalent (4f14) and trivalent (4f13) at ambient pressure and was determined to be 2.18+. The results are compared to those for a corresponding 2/1 cubic approximant crystal. The formation of this new iQC is discussed in terms of the atomic size factor (δ) and the valence electron-to-atom ratio (e/a).

AB - We report on the formation of a new icosahedral quasicrystal (iQC) in the Au-Sn-Yb alloy system. This iQC has a primitive icosahedral lattice with a lattice constant aico of 0.5447(7) nm and a composition that was determined to be Au60.0Sn26.7Yb13.3. X-ray absorption spectroscopy measurement of the near Yb L3 edge demonstrates that the Yb valence in the iQC is an intermediate valence between divalent (4f14) and trivalent (4f13) at ambient pressure and was determined to be 2.18+. The results are compared to those for a corresponding 2/1 cubic approximant crystal. The formation of this new iQC is discussed in terms of the atomic size factor (δ) and the valence electron-to-atom ratio (e/a).

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Formation of an Intermediate Valence Icosahedral Quasicrystal in the Au-Sn-Yb System

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