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Tag: Neighbouring atom

Radius Ratio and its Significance

Post author By Hemant More
Post date February 1, 2020
2 Comments on 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 […]

Physical Chemistry

Tetrahedral Voids and Octahedral Voids

Post author By Hemant More
Post date February 1, 2020
1 Comment on 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 […]

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 […]

Physical Chemistry

Numerical Problems on Type of Crystal Structure

Post author By Hemant More
Post date February 1, 2020
1 Comment on Numerical Problems on Type of Crystal Structure

Science > Chemistry > Solid State > Numerical Problems on Type of Crystal Structure In this article, we shall study to solve problems to calculate the atomic radius, the distance between atoms in the unit cell and to decide the type of crystal structure. Example – 01: A naturally occurring gold crystallizes in face centred […]

Physical Chemistry

Numerical Problems on Density of Solid

Post author By Hemant More
Post date January 31, 2020
3 Comments on Numerical Problems on Density of Solid

Science > Chemistry > Solid State > Numerical Problems on Density of Solid In this article, we shall study to solve numerical problems to find the density of solid, edge length and volume of the unit cell. Example – 01: Silver crystallizes in face centred cubic structure. The edge length of a unit cell is […]

Physical Chemistry

Packing Efficiency of Unit Cell

Post author By Hemant More
Post date January 24, 2020
9 Comments on Packing Efficiency of Unit Cell

Science > Chemistry > Solid State > Packing Efficiency of Unit Cell In this article, we shall study the packing efficiency of different types of unit cells. In whatever way the constituent particles atoms, molecules or ions are packed, there is always some free space in the form of voids. The fraction of the total […]