Debye-Scherrer diffraction patterns of powder samples with a

Продукт No: P2542301

Principle

A polycrystalline powder sample of zinc 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 Debye-Scherrer pattern is automatically recorded. The evaluation of the pattern not only allows the Bragg reflexes to be assigned to the individual lattice planes and so also the corresponding Bravais lattice type to be obtained, but in addition results in values for their spacing as well as for the lattice constants of zinc and the number of atoms in the unit cell.

Tasks

  1. Record the intensity of the Cu X-rays back scattered by a zinc powder sample as a function of the scattering angle.
  2. Calculate the lattice constants of the substance from the angular positions of the individual Bragg lines.
  3. Assign the Bragg reflexes to the respective planes of the zinc lattice and determine the Bravais lattice type of it.
  4. Determine 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



Перечень материалов (вы́писка) Продукт Количество
XR 4.0 expert unit, X-ray unit, 35 kV 09057-99 1
XR 4.0 X-ray Plug-in Cu tube 09057-51 1
XR 4.0 X-ray goniometer 09057-10 1
XR 4.0 Software measure X-ray 14414-61 1
Geiger-Mueller counter tube, type B, BNC cable 50 cm 09005-00 1
XR 4.0 X-ray LiF crystal, mounted 09056-05 1
XR 4.0 X-ray Universal crystal holder for X-ray unit 09058-02 1
XR 4.0 X-ray Diaphragm tube w. nickel foil 09056-03 1
XR 4.0 X-ray Diaphragm tube d = 2 mm 09057-02 1
XR 4.0 X-ray sample holder for powder samples (diffractometry) 09058-09 1
Zinc,powder 500 g 31979-50 1
Data cable USB, plug type A/B, 1.8 m 14608-00 1
Vaseline 100 g 30238-10 1
Microspoon, steel 33393-00 1

Литература по данной статье

Название Продукт Язык
Handbuch Lehrerversuche mit Röntgenstrahlung für die XR 4.0 expert unit, TESS expert Physik 01200-01 DEU
TESS expert Physics Handbook X-ray Experiments for XR 4.0 expert unit 01200-02 ENG
XRS 4.0 X-ray Strukturanalyse Erweiterungsset 09140-88

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Продукт No: P2542301

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