Diffraction by solids, Chemistry

DIFFRACTION BY SOLIDS

Diffraction performs when a wave interacts with a lattice whose dimensions are of the same order of magnitude as that of the wavelength of the waves. The lattice scatters the radiation, and the scattered radiation from one point interferes with the radiation from others so as to either reduce it (destructive interference), or enhance the amplitude of the radiation (constructive interference). The pattern of destructive and constructive interference yields information about molecular and crystal structure.

1228_diffraction by solid.png

 

Fig.1. Constructive (a) and destructive (b) interference of two

waves.

In the case of solids, this wavelength must be of the same order as the crystal lattice spacing (ca. 0.1nm), and there are three primary types of radiation which are used for structural studies of solids. The most commonly used radiation, X-rays, have wavelengths of the order of 0.15 nm, and in the course of diffraction studies are scattered by the electron density of the molecule.

Posted Date: 7/20/2012 3:20:56 AM | Location : United States







Related Discussions:- Diffraction by solids, Assignment Help, Ask Question on Diffraction by solids, Get Answer, Expert's Help, Diffraction by solids Discussions

Write discussion on Diffraction by solids
Your posts are moderated
Related Questions
The quantum number 'm' of a free gaseous atom is associated with : (1) The effective volume of the orbital (2) The shape of the orbital (3) The spatial orientation of the

Explain objectives of annealing? Discuss the various annealing processes? Is spheroidising different from annealing? Illustrate. A  slow  cooling  rate  from  eutectoid  tempe

electronic cofiguration of f-block elements

Phenol (Carbolic acid), C 6 H 5 OH or Hydroxy benzene It was observed by Runge in the middle oil fraction of coal-tar distillation and termed it 'carbolic acid' (carbo = coal, o

how can i calculate the bidding energy

Q. Uses of selenium? Uses of selenium include photocopying process of xerography, decobrisation of glasses and as a catalytic agent particularly in the isomerisation of certain

The α -particle scattering experiment of Rutherford concluded that: (1) The nucleus is made up of protons and neutrons (2) The number of electrons is exactly equal to number

I want questions for numericals on lime soda process

Q. Show the Liquation in purification of metals? Crude tin, bismuth and lead are purified by liquation. In this process, the impure metal is placed at the top of a sloping hear

Which of the following is not isoelectronic : (1) Na +                 (2) Mg 2+                          (3) O 2-                        (4) Cl - Ans:(d)Cl -