Structure factor calculation for Po (polonium)
hkl
h
2 þ k
2 þ l
2
ð
Þ
1=2
2a
F Po hkl
ð Þ ¼ f Po ; ðelectronÞ
000
0
84
001
0.1489
75.20
011
0.2105
69.97
020
0.2977
63.28
021
0.3328
60.78
111
0.2578
66.24
211
0.3646
58.61
220
0.4210
54.65
221
0.4466
53.49
300
0.4466
53.40
301
0.4707
51.99
311
0.4937
50.69
320
0.5367
48.41
321
0.5570
47.39
Example 5 Determine the general form of structure factor and intensity corresponding to a body-centered cubic unit cell. Calculate the structure factor for
Chromium (Cr) whose lattice parameter a = 2.884 Å and Z = 24.
Fig. 8.2 The atomic scattering curve of Po
306
8 Structure Factor Calculations