Reciprocal lattice for FCC and diffraction peaks

[Taylor_1989]

Homework Statement

For a FCC crystal describe all the reciprocal lattice points corresponding to the first two diffraction peaks.

Relevant Equations

$$F_{\left(hkl\right)=\sum f\:e^{2\pi i\left(h\hat{x}+k\hat{y}+l\hat{z}\right)}}$$

My issue is more with the steps to approach rather than the calculations. I was just wondering if someone could confirm my approach to be correct.

As it asking for the reciprocal lattice of an FCC I assume this would mean I need to use the points on the BCC to calculate the geometrical structure factor and then from this a use the first two diffraction planes for a FCC which are {111} and {200} into the geometrical structure factor?

Also not really sure if this is classed as a intro to physics or advance physics question. If it is advance how could I move to that forum?

 

[jbsteele]

Yes, your approach is correct. This type of question is usually classified as an introductory physics question, but if you need help from advanced physicists, you can post your question in the Advanced Physics section of the forum.