What is non-stoichiometric defect?

Nonstoichiometric point defect arises when the ratio of the number of atoms of one kind to that of other kind or the ratio of the number of cations to anions becomes different from that indicated by its chemical formula. In this defect, stoichiometry of the compound is changed.

What is non-stoichiometric defect with example?

Nonstoichiometric inorganic solids contain the constituent elements in a non-stoichiometric ratio due to defects in their crystal structures. These defects are of two types: (i) metal excess defect and (ii) metal deficiency defect.

What are the types of non-stoichiometric defect?

Types of Non-Stoichiometric Defect:

• Metal excess defect due to anionic vacancies: This occurs due to the absence of anions from its original lattice site in crystals.
• Metal excess defect due to the presence of extra cations at interstitial sites: Here, on heating the compound, it releases extra cations.

What are non-stoichiometric defects Class 12?

NCERT Chemistry Class 12 : When the ratio of cations & anions are not equal (required for ideal crystal), then compounds are called non-stoichiometric compounds & defect in these compounds are called non-stoichiometric defects.

Which is the best description of a non stoichiometric defect?

Non-stoichiometric defect: The defect that causes the ratio of the number of cations to anions to be different from that indicated by the ideal chemical formula is known as a non-stoichiometric defect. Non-stoichiometric defects are of two types – metal excess defects and metal deficiency defects.

Why do inorganic solids have a non stoichiometric ratio?

Nonstoichiometric inorganic solids contain the constituent elements in a non-stoichiometric ratio due to defects in their crystal structures. These defects are of two types: (i) metal excess defect and (ii) metal deficiency defect. (i) Metal Excess Defect.

What are the defects in Class 12 chemistry?

Class 12 Chemistry The Solid State. Non-Stoichiometric Defects. Non-Stoichiometric Defects. Nonstoichiometric inorganic solids contain the constituent elements in a non-stoichiometric ratio due to defects in their crystal structures. These defects are of two types: (i) metal excess defect and (ii) metal deficiency defect. (i) Metal Excess Defect.

What makes you want to look up nonstoichiometric?

“Nonstoichiometric.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/nonstoichiometric. Accessed 27 May. 2021. What made you want to look up nonstoichiometric? Please tell us where you read or heard it (including the quote, if possible).