Phelma Formation 2022

Crystallography and crystal chemistry - 3PMMCRI9

  • Number of hours

    • Lectures 12.0
    • Tutorials 12.0

    ECTS

    ECTS 2.0

Goal(s)

To give basic crystallography and crystal chemistry for solid state physics courses and characterization of materials.

Contact Estelle APPERT

Content(s)

I - Basic geometrical crystallography (4h)

  • Ponctual lattice (lattice, pattern, unit cells, plane, Miller indexes)
  • Crystallographic directions and planes (atomic density), reticular distances
  • Symmetry operators in the crystal: plane and glide mirrors, rotation and screw axes, inversion center. Two- and three-dimensional space groups, point groups, Laüe groups.

II - Close packed structures and main structural types (3h)

  • Description of crystal structures , fcc, hc, bcc
  • Interstitial sites
  • Covalent structures (diamond), ionic structures (AX, AX2, ABX3, AB2X4 types)

III - Reciprocal lattice (2h)

  • Definition, Fondamental properties
  • Reciprocal lattice in different crystalline systems
  • Interreticular distances versus reciprocal parameters
  • Relations in between direct and reciprocal unit cell volumes

IV - X-ray diffraction (3h)

  • Nature and production of X-ray, X-ray spectrum, X-ray absorption
  • Bragg's law, Conditions of diffraction (Laüe equations, Ewald's sphere)
  • Diffracted intensity (atomic diffusion factor, structure factor, anomalous diffusion)
  • Classification of experimental methods (powder diagram)


Prerequisites

Test

Written exam of 2h
No document allowed



N1 = contrôle continu 10% + écrit 90%
N2 = contrôle continu 10% + écrit 90%

Additional Information

Course list
Curriculum->F1A-PMP->Semester 1

Bibliography

J.J. Rousseau : Cristallographie géométrique et radiocristallographie (Masson)