Crystal Structure of Europium C60 Compounds |
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| Authors: | H. Ootoshi K. Ishii A. Fujiwara T. Watanuki Y. Matsuoka H. Suematsu |
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| Affiliation: | Department of Physics , University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo , 113-0033 , JAPAN |
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| Abstract: | Abstract We have studied crystal structures of europium C60 compounds by high resolution x-ray diffraction measurements. In the systematic synthesis of Eu x C60 for x (0 ≤ x ≤ 6), two stable phases appear at x = 3 and 6. Eu6C60 has a bcc structure, which is an isostructure to M 6C60 (M represents an alkali or alkaline earth metal). Eu3C60 has a superstructure derived by doubling the fcc pristine C60 crystal along three principal axes. This superstructure comes from an ordering of cation vacancies, which is analogous to Yb2.75C60. |
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| Keywords: | C60 rare earth fulleride synchrotron x-ray diffraction |
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