" by x-ray diffraction methods, the unit length of naci is observed to be 0.527 nm. the density of nacl is found to be 2.164 g cm. what type of defect exists in

" By X-ray diffraction methods, the unit length of NaCi Is observed to be 0.527 nm. The density of NaCl is found to be 2.164 g cm. What type of defect exists in the crystal? Calculate the percentage of Na" and CI ions missing? (a) (b) 0.8% (c) 2b d) 1.8%