Question

It is necessary to satisfy the Bragg Law in order to generate constructive reflection of X-Rays from a crystalline sample. How is this achieved in a practical laboratory diffractometer?

Answer 1

In practical labrotory there are three methods to do this.

1.Laue method : in this method the sample placed in gionemeter which can be rotated to change the orientation of single crystal.

2.Rotating crystal method : In this method a monochromatic X ray is used mounted on a single rotating spindle such that one of its crystalographic axis coinside with the axis of rotation which is kept perpendicular to the direction of incident beam.

3.powder method : in this method the sample is placed in the form of a powder with large number of crystals with random orientation