Subject: Physical Chemistry · Chapter: Solid State Chemistry · Topic: X Ray Diffraction Bragg · Exam: NET DEC 2013 · Marks: 2 · Difficulty: Medium
Both NaCl and KCl crystallize with the fcc structure. However, the X-ray powder diffraction pattern of NaCl corresponds to the fcc structure whereas, that of KC corresponds to simple cubic structure. This is because
(a)$\mathrm{K}^{+}$ and $\mathrm{Cl}^{-}$ are isoelctronic
(b)$\mathrm{Na}^{+}$ and $\mathrm{Cl}^{-}$ are isoelctronic
(c)$\mathrm{K}^{+}$ and $\mathrm{Cl}^{-}$ are disordered in the lattice crystal