Why stoichiometric defect is also called intrinsic defects?

Stoichiometric defects are so called because they do not alter the stoichiometry of the crystal ( Schottky defect and Frenkel defect). They are called intrinsic defects beacause it is due to the deviation from regular arrangement of atoms or ions within the crystal and no external substance is added.

What is meant by intrinsic defects?

Intrinsic defect is a property that determines the conductivity of electrons in a given structure. The weakness of a given structure is determined by its property to withstand stress and strain. The weakness that creates the stress or strain is referred to as intrinsic defect.

Which defect is also known as intrinsic defect *?

Stoichiometric Defects The defect in which stoichiometry of the compound remains the same as shown by their chemical formula. It is also called an intrinsic or thermodynamic defect. These are further classified into two types; Vacancy Defect: (Vacant sites in the lattice)

Why the defect of crystalline solids are called thermodynamics defect?

As the temperature increases, the particles are likely to leave their lattice site and may occupy positions elsewhere. In other words, the defects are likely to increase with the rise in temperature. Therefore, these are called thermodynamic defects.

What is the difference between stoichiometric and nonstoichiometric defects?

Stoichiometric defects are those that do not disturb the stoichiometry of a compound. Nonstoichiometric defects are defects in crystal structures that disturb the stoichiometry of the crystal. They do not affect the stoichiometry of the compound. They change the stoichiometry of the compound.

Which compound has both Schottky and Frenkel defect?

Silver bromide (AgBr) is the compound that exhibits Schottky as well as Frenkel defect.

What is stoichiometric and non stoichiometric defects?

Stoichiometric defects are those that do not disturb the stoichiometry of a compound. Nonstoichiometric defects are defects in crystal structures that disturb the stoichiometry of the crystal. Effect on Stoichiometry. They do not affect the stoichiometry of the compound. They change the stoichiometry of the compound.

What is intrinsic and extrinsic point defects?

The intrinsic point defect is related to the presence of vacancies (missing atoms), interstitial atoms (added atoms), or antisites (exchanged atoms for polar material), while extrinsic point defects are caused by the presence of foreign atoms in the crystal structure.

Why the Schottky and Frenkel defect are called as thermodynamic or intrinsic defect?

Answer: The Schottky defect and Frankel defect are called thermodynamic defects because the number of these defects depends on the temperature. These defects called intrinsic defects because these defects are integral to the given crystal and these do not alter the overall composition of the solid.

Which is non-stoichiometric defect?

The defects which disturb the stoichiometry of the compounds are called non-stoichiometric defects. These defects are either due to presence of excess metal ions or deficiency of metal ions.

What type of stoichiometric defect is shown by ZnS and AgBr?

Frenkel defect
(i) ZnS shows Frenkel defect. (ii) AgBr shows Frenkel defect as well as Schottky defect.

Why are Frenkel defect found in AgCl?

Why is Frenkel defect found in AgCl? Frenkel defect is shown by ionic substance in which there is a large difference in the size of ions so it is due to difference in size of Ag+ and CI–, Ag+ occupies voids.