Draw a neat labelled diagram of the defect observed when molten AgCl is crystallised with a small amount of CdCl2.
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When AgCl is doped with CdCl
2
, two Ag
+
ions are replaced by one Cd
+2
ion. The Cd
+2
ion occupies the site of one of the Ag
+
ion and a cation vacancy are created at the site of the other Ag
+
ion.
The defect is known cation vacancy defect as a Ag
+
ion from the lattice is absent due to the presence of adjacent Cd
+2
ion.
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