A polycrystalline, cubic face-centered crystallizing powder
sample is irradiated with the radiation from a Roentgen 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. The intensities of the
individual reflex lines are determined and compared with those
theoretically expected. In addition, the evaluation allows the
Bragg reflexes to be assigned to the individual lattice planes, and
both their spacing and the corresponding Bravais lattice type to be
- Record the intensity of the Cu X-rays back scattered by a cubic
crystallizing copper powder sample as a function of the scattering
- Calculate the lattice plane spacings from the angle positions
of the individual Bragg lines.
- Assign the Bragg reflexes to the respective lattice planes.
Calculate the lattice constant of the substance and the Bravais
- Determine the intensity of the individual reflex lines and
compare them with the theoretically expected intensities.
- Determine the number of atoms in the unit cell.
What you can learn about
- Crystal lattices
- Crystal systems
- Reciprocal lattice
- Miller indices
- Structure factor
- Atomic scattering factor
- Lorentz-polarization factor
- Multiplicity factor
- Debye-Waller factor
- Absorption factor
- Bragg scattering
- Characteristic X-rays
- Monochromatization of X-rays