2θ (degree)

27.82

32.24

46.22

54.81

57.45

θ (rad.)

0.2430

0.2816

0.4037

0.4787

0.5018

β (rad.)

0.0041

0.0039

0.0054

0.0061

0.0060

βcosθ

34.92

37.30

27.68

25.44

26.36

sinθ

0.0040

0.0037

0.0050

0.0055

0.0053

ε = 0.00175

D = 66.04 nm