A crystalline sample of magnesium oxide is characterized by

A crystalline sample of magnesium oxide is characterized by x-ray diffraction using two different wavelengths of x-ray radiation. How will the calculated d-spacings (d_hkl) for magnesium oxide change as the wavelength of the x-ray radiation is decreased? The calculated d_hkl values will increase. The calculated d_hkl values will decrease. The calculated d_hkl values will not change. Briefly explain:

Solution

Answer a) The calculated d_hkl value will increase.