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前已报导,用HREM研究铜的初期氧化时,发现在生成Cu_2O之前,还存在比Cu_2O含氧量低的Cu_4O、Cu_8O。本文报导的是比Cu_8O含氧量更低的又一种铜的亚氧化物Cu_(64)O。它存在于储存多年的铜粉中,也能在空气中加热铜粉生成。用JEM—200CX进行观察,通过电子衍射确定这种晶体为B心正交结构。通过结构模型的设计和动力衍射理论的计算,用模拟计算象和观察相比较的方法确定Cu_(64)O晶体的单胞内含有的128个Cu原子和2个氧原子的位置。图1给出Cu_(64)O的晶体结构和母体Cu的关系。粗线划出的为Cu_(64)O的单胞,晶格常数a=
It has been previously reported that when HREM was used to study the initial oxidation of copper, it was found that Cu_2O, Cu_2O and Cu_2O were lower than that of Cu_2O prior to the formation of Cu_2O. This paper reports a further copper suboxide Cu_ (64) O which is lower in oxygen content than Cu_8O. It exists in the storage of copper powder for many years, but also in the air heated copper powder generated. Observed with JEM-200CX, electron diffraction confirmed that this crystal is B-center orthogonal structure. Through the structural model design and dynamic diffraction theory calculation, the positions of 128 Cu atoms and 2 oxygen atoms contained in the unit cell of Cu 64 Cu crystal were determined by the comparison between the simulated image and observation. Figure 1 shows the Cu_ (64) O crystal structure and the relationship between the parent Cu. Thick line drawn Cu_ (64) O unit cell lattice constant a =