Potassium bromide, KBr, crystallizes like NaCl in a face-cen…
Potassium bromide, KBr, crystallizes like NaCl in a face-centered lattice. The ionic radii of K+ and Br– ions are 133 pm and 195 pm, respectively. Assuming that all Br– ions are positioned in the face and corners of the unit cell, while the K+ ions are positioned along the edge alternating between anions, calculate the length of a unit cell edge.