packing of constituent particles in crystals

Assumption - It is assumed that the atoms are hard spheres of identical size. Packing is done in such a way that they occupy maximum available space. This type of packing is called close packing . The packing of the spheres of equal size latices place as foll..

Crystallisation is the process by which crystals are obtained from a saturated solution of a substance, by allowing the solvent to evaporate slowly. If there are any insoluble impurities in the solution, they can be removed by filtration. Then by slow evaporation pure crystals c..

Crystals are solid particles bounded by plane surfaces, which make definite angles with each other. This gives a definite geometrical shape to the crystal. These shapes are different for different crystals (Fig.6.13). Crystals of the same subs..

In metallic crystals the constituent particles are positive kernels i.e., nuclei where inner electrons are dispersed in a sea of mobile valence electrons. The forces present between the constituents are metallic bonds. The main characteristics of metallic ..

In a crystalline solid, the constituent particles (atoms, ions or molecules) are arranged in a regular order. An interaction of a particular crystalline solid with X-rays helps in investigating its actual structur..

In a crystalline solid, the constituent particles (atoms, ions or molecules) are arranged in a regular order. An interaction of a particular crystalline solid with X-rays helps in investigating its actual structure. Crystals are found to act as diffraction gratings for..

Large, well formed crystals can be obtained, by the slow evaporation of a cold and saturated solution of the substance. A large crystal can be grown by suspending a small well formed crystal, in a cold and saturated solution of the substance. The solution must be taken..

Keeping the following points in mind we can calculate the number of atoms in a unit cell. * An atom at the corner is shared by eight unit cells. Hence an atom at the corner contributes 1/8 to the unit cell * An atom at the face is a shared by two unit cells Contribution of each atom..

Filtration is the process of separating the solid from liquids by passing through a filter. Normally, after the tea is made, the leaves are separated by straining it through a strainer, or a clean piece of cloth. What you are doing is called filtration. The difference between filtration in a kitche..

The process by which a soluble solid can be obtained from a solution by allowing the solvent to vaporize, is called evaporation. Many of you might be aware, that for preparing salt, seawater is taken in large pans and water is allowed to evaporate, by the heat of the sun. In the laboratory, salt ca..