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when1226

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[交流] XRD实验...新生求助啊...谢谢...

X-ray Powder Diffraction

1. What wavelength would you use for diffraction experiments on crystalline matter 1000m, 1m, 10-5m, 10-10m or10-15m? Give your reasons.
2. Why do we expect zero intensity for a direction, a few degrees, away from the reflection?
3. There are three sets of non-parallel (100) type planes in a simple cubic crystal, namely, (100) (010) and (001). How many sets of planes of the type (110) are there?


1. 1000m, 1m, 10-5m, 10-10m and 10-15m 因为波长和晶面间距相近容易发生衍射

2. 这个做不来了...是为什么啊....我的想法是..因为衍射图样中央亮条纹边上是暗条纹....求指点...

3. (110), (101), (011) ,(-110), (-101), (0-11)..和这些的向量的负数
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