Diffraction angle in degree (2θ)

B (FWHM) in (˚)

b in radian (10−3)

Particle size

D = (0.9*λ)/b cosθ (nm)

25.369

0.2429

4.237

35

31.376

0.367

6.402

23

39.372

0.333

5.809

26

46.259

0.341

5.948

26

49.102

0.306

5.338

30

63.793

0.199

3.482

49