non stoichiometric

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..

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 defect..

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 defects Impurity defect..

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 of thei..

Structures of Oxides of Iron - 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..

O 2 - form a cubic close packing. All the octahedral sites are not occupied by Fe 2 + , because a small number of Fe 2 + are replaced by Fe 3 + ions. For every three Fe 2 + replaced, there are two Fe 3 + ions and one octahedral site is vacant. Electrical neutrality is maintained. Theref..