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Physical Chemistry

Defects in Crystal Structure

Science > Chemistry > Solid State > Defects in Crystal Structure In this article, we shall study defects in the crystal structure, sources of defects and their types. Source of Defects in Crystal Structure: At absolute zero, crystals tend to have a tendency to have a perfectly ordered arrangement. This arrangement at absolute zero represents the […]

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Physical Chemistry

Radius Ratio and its Significance

Science > Chemistry > Solid State > Radius Ratio and its Significance The ratio of the radius of cations (r+) to the radius of the anion (r–) is known as the radius ratio of the ionic solid. The significance of radius ratio: It is useful in predicting the structure of ionic solids. The structure of […]

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Physical Chemistry

Tetrahedral Voids and Octahedral Voids

Science > Chemistry > Solid State > Tetrahedral Voids and Octahedral Voids In this article, we shall study two types of voids formed during hexagonal closed packing namely, a) Tetrahedral voids and b) octahedral voids. Let us consider a closed pack hexagonal packing in the first layer as shown. There are empty spaces between the […]

Categories
Physical Chemistry

Packing in solids

Science > Chemistry > Solid State > Packing in solids In this article, we shall study the different types of close packing of the constituent particles in solids. The Principle of Packing in Solids: In a crystal particle (atoms, molecules or ions) occupy the lattice points in the crystal lattice. These particles may be of […]