Principle

A cubic crystalline powder sample is irradiated with the
radiation from a X-ray tube with a copper anode. A Geiger-Mueller
counter tube is automatically swivelled to detect the radiation
that is constructively reflected from the various lattice planes of
the crystallites. The Bragg diagram is automatically recorded. A
graphical evaluation procedure is used to assign the reflexes to
the individual lattice planes and to determine the corresponding
Bravais lattice type as well as the lattice constant of the
substance.

Tasks


Record the intensity of the Cu X-rays back scattered by a
cu-bic powder sample as a function of the back scattering
angle.

Assign the Bragg reflexes to the respective lattice planes.
Determine which Bravais lattice type it has.

Calculate the number of atoms in the unit cell.


What you can learn about


Crystal lattices

Crystal systems

Bravais-lattice

Reciprocal lattice

Miller indices

Structure factor

Atomic scattering factor

Bragg scattering

Characteristic X-rays

Monochromatization of X-rays