Difference between Stoichiometric defects and Non-stoichiometric Defects
Difference between Stoichiometric defects and Non-stoichiometric Defects are in tabular form below.
Stoichiometric defects |
Non-stoichiometric Defects |
Stoichiometric defects do not disturb the stoichiometry of a compound. | Non- Stoichiometric defects are defects in the crystal structure that disturb the stoichiometry of the crystal. |
There are Two type of stoichiometric defects which are –
1) Schottkydefects 2) frankel defrects. |
There are Two type of Non-Stoichiometric defects Which are –
1) metal excess defects 2) metal deficiency defects. |
They may arises to Schottky defects which occur due to the loss of atom from a metric unit they cause density of the lattice to be reduced. | They may arise due to metal excess defects and metal deficiency defects.
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Frankel defects: itis a point defects that occur due to the loss one atom or ion, this create a vacant inside the lattice structure electron or electrical charge of the crystal remain uncharged because no ion are removed or added from outsides. | Metal excess defects : It is a non-stoichiometric defects are caused by anionic vacancies and by extraction in the interstitial sites.
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They do not affect the stoichiometry of the compound. | They change the stoichiometry of the compound. |
Examples of stoichiometric Defects – Schottky defect, Frankel Defect. | Examples of non – stoichiometric Defects are – metal excess defect, metal deficiencies defects |