Determine powder pattern, S, values for the first four
reflecting planes, listed in Appendix C, if the specimen is
a gold powder. Assume that Cu Ka1 radiation (l
0.1541 nm) is used and that the lattice parameter of the
gold crystal is 0.4078 nm.
Answers
Answer:
The pertinent reflecting planes are {111}, {200}, {220}, and {311}. Now with regard to the Bragg
equation, that is ݊ߣ ൌ 2݀ sin ߠ ,the order of reflection number n is included in the Miller
indices. Consequently, solving the Bragg equation for the angle of reflection, ߠ results in the
following relation:
ߠ ൌ sinିଵ ߣ
2 ൈ ݀
The arc distance along the file, S, can now be obtained from the relation S = 2Rߠ .The values of
݀will now be determined.
݀ଵଵଵ ൌ
0.4078
√1ଶ 1ଶ 1ଶ
ൌ 0.2354 ݊݉
݀ଶ ൌ
0.4078
√4
ൌ 0.2039 ݊݉
݀ଶଶ ൌ
0.4078
√8
ൌ 0.1442 ݊݉
݀ଷଵଵ ൌ
0.4078
√11
ൌ 0.1230 ݊݉
The corresponding values of ߠ are as follows:
ߠଵଵଵ ൌ sinିଵ ൬ 0.1541
2 ൈ 0.2354൰ ൌ sinିଵሺ0.2373ሻ ൌ 19.11° ൌ 0.334 ݎ݀ܽ
ߠଶ ൌ sinିଵ ൬ 0.1541
2 ൈ 0.2039൰ ൌ 22.30° ൌ 0.388 ݎ݀
Explanation:
Answer:可以翻譯一下答案嗎
Explanation: