The diffraction pattern of a certain metal was measured with X-ray radiation of a wavelength of 5.25 Å. The third-order Bragg diffraction peak was found at an angle 2θ of 70°. The d-spacing between the diffracting planes in the metal is _______
(sin 70° = 0.94, sin 35° = 0.57)
1
13.8 Å
2
14.2 Å
3
12.4 Å
4
14.6 Å
5
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