Difference between Schottky and frenkel defect
Schottky defect |
frenkel defect |
1) Schooty defect is a type of point defect which occur due to the loss of atoms from a crystal lattice in Stiochiometric units.
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Frenkel defect is a type of point defect that occur due to the loss one atoms or small ion, this create a vacant inside the lattic structure. |
2) This defect was discovered By scientist Walter H. Schootky. Hence, name is given as defects Schottky defect. | This defect is discovered By a scientists, Yakav Frankel, hence name given asfrankeldefrects. |
3) Schotty defect cause the density of the lattice to be reduced. | Frankel defect does not have any influence on the density on the density of the lattice. |
4) The mass of the lattice is reduced when schotty defect occurs. | The mass of the frankel defect remain constant even after the frankel defect occurred. |
5) In a schotty defect, Atom or ions leave the lattice creating schooty defects. | in a frankel defect, Atom or ions leaves their position but remain inside the lattice in frankel defect. |
6) Schotty defect occurs in lattices with ions with similar in their sizes. | frankel defect occur in lattices with ion large differences in thor size. |
7) Same number of cations and anions are missing from the lattice site in shottky defects. | A cation leaves the normal lattices site and occupies the Intersecting sites. |
8) Schooty defects found in highly ionic compounds with high coordination numbers where the cation and anion are similar sizes. | Frankel defects found in ionic compounds with low coordination numbers where anions are much larger in size than cations. |
9) Density of the solid crystal is less than normal. | Does not change the density of the solid. |
10) Schooty defect found in lattice having ions with nearly equal sizes. | one or more atom or ion undergo frankel defect therefore the number of interesting sites is equal to the number of defects present in the lattice. |
11) Atom permanently leave the crystal. | 11) Atom leaves the original sites within the solid crystal. |
12) Common material where Shottky defect can be found are – Nacl, KCl, AgBr, CeO2,ThO2. | Common material where frankel defect can be found are – zinc sulphide, silver chloride, silver bromide. |