The rock salt NaCl lattice

Worked example 5.2 Compound stoichiometry from a unit cell 

The total number of Na and CP ions belonging to the unit cell is calculated as follows  

The ratio of Na+ Cl ions is 4 4 = 1 1 This ratio is consistent with the formula NaCl. 

The unit cell of AgCl (NaCl type lattice) can he drawn with Ag ions at the corners of the cell, or Cl at the corners. Confirm that the number of Ag+ and Cl ions per unit cell remains the same whichever arrangement is considered. 

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