The numbers of spheres (atoms) that are found inside a simple cubic unit cell, body centered cubic unit cell and face centered cubic unit cell have to be determined. Concept Introduction: In packing of crystalline solids, the components – ions, atoms or molecules are designated as spheres. The components arrange themselves in a well-defined, compact, regular and three – dimensional pattern. The simplest and basic unit of a crystalline solid is known as unit cell . It is cubic in shape. It is the building block of crystalline solids. The unit cells repeat themselves to build a lattice. Crystalline solids consist of many of such lattices. There are basically three types of unit cells – Simple cubic unit cell, Body-centered cubic unit cell and Face-centered cubic unit cell, they form Simple cubic lattice, Body-centered cubic lattice and Face-centered cubic lattice respectively. These three types of unit cells differ in the arrangement of the components.

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Chapter 12, Problem 12.44QP

Interpretation Introduction

Interpretation:

The numbers of spheres (atoms) that are found inside a simple cubic unit cell, body centered cubic unit cell and face centered cubic unit cell have to be determined.

Concept Introduction:

In packing of crystalline solids, the components – ions, atoms or molecules are designated as spheres. The components arrange themselves in a well-defined, compact, regular and three – dimensional pattern.

The simplest and basic unit of a crystalline solid is known as unit cell. It is cubic in shape. It is the building block of crystalline solids. The unit cells repeat themselves to build a lattice. Crystalline solids consist of many of such lattices.

There are basically three types of unit cells – Simple cubic unit cell, Body-centered cubic unit cell and Face-centered cubic unit cell, they form Simple cubic lattice, Body-centered cubic lattice and Face-centered cubic lattice respectively. These three types of unit cells differ in the arrangement of the components.

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