non stoichiometric defects

Non-stoichiometric Defects - If an imperfection causes the ratio of cations to anions to become different from that indicated by the ideal chemical formula, the defect is called non-stoichiometric. There are three types: Metal excess Metal deficiency Impurity..

If an imperfection causes the ratio of cations to anions to become different from that indicated by the ideal chemical formula, the defect is called non-stoichiometric. There are three types: Metal excess Metal deficiency Impurity defects..

If imperfections in the crystal are such that the ratio between the anions and cations remain same as represented by the molecular formula, the defect is called a stoichiometric defect. There are three types of stoichiometric defects: Schottky ..

Types of defects in Crystals - The defect, which arises due to the irregularity in the arrangement of atoms or ions are called point defects. Point defects are of three types: Stoichiometric defects Non-stoichiometric defect..

A bag contains 21 bulbs, out of which 10 are defective and 11 are non-defective. Express verbally the probability of picking a non-defective bulb. => 9 out of 21 or 11 out of 21 or 6 out of 21 or 13 out of 21..

Iron forms three different types of oxides, which are FeO, Fe 2 O 3 and Fe 3 O 4 . These are non-stoichiometric (the ratio of cations and anions may vary from that given in the formula) and are easily oxidized or reduced into each other. These aspects can be explained on the basis ..

This law was proposed by Louis Proust in 1799, which states that: 'A chemical compound always consists of the same elements combined together in the same ratio, irrespective of the method of preparation or the source from where it is taken'. For example, water is always found to contain only two e..

In healthy individuals, the ECG remains reasonably constant, even though the heart rate changes with the demands of the body. The electrical activity of the heart shows changes under the following situations. a) Change in ionic environment of the heart b) A defect in the conduction system..

Metallic hydrides are formed by most of the 'd' block elements (i.e., transition elements), on reacting with hydrogen. Hydrogen exists in the atomic rather than ionic form. Due to small size of hydrogen atoms when compared to the metal atoms, hydrogen atoms occupy interstitial positions in the met..

. It is characterised by the total absence of melanin in the skin, caused by the expression a homozygous recessive gene. Phenyl Ketonuria (PKU) is a metabolic disorder seen in growing children. In this condition an enzyme phenyl pyruvic hydroxylase necessary for amino acid metabolism, is not produc..