科研之友
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摘要
The nominal composition of the Yb-3 C-60 compound is characterized by means of x-ray photoelectron spectroscopy. Evidence of the divalent state for the Yb cation in the as-grown crystalline Yb3C60 is obtained. After exposure to air, the Yb3C60 compound transforms to an amorphous phase and Yb2O3 compound, while the valence state of the Mb cations changes from divalent to trivalent.
- 出版日期2001-5
- 单位南开大学
