Pensum/l?ringskrav

Structures of crystalline materials (pp. 58)

Symmetry of periodic structures.

Packing, networks, MOF.

Examples: Spinel, garnet, pyrochlore, perovskite. Groups¨Csubgroups.

Defects, extended defects and ordered vacancy structures (pp. 44)

Compositional variations due to defects: Point-defect thermodynamics. Solid solutions.

Extended defects: 1D (edge and screw dislocations), 2D (stacking faults, twins, antiphase boundaries, shear structures).

3D order: Defect ordering and clustering. Infinitely adaptive structures.

Nonstoichiometry and modulated structures, commensurate and incommensurate.

Nonstoichiometry and its transport (pp. 53)

Nonstoichiometry control: Oxidative and reductive nonstoichiometry, doping. Oxides with ordered vacancies.

Nonstoichiometry transport I: Fick laws. Hopping, steady-state diffusion under gradient of concentration and electric field, conductivity versus diffusivity.

Nonstoichiometry transport II : Ambipolar diffusion. Nonsteady-state diffusion. Sintering.

Phase diagrams and phase transitions (pp. 45)

Multi-component phase diagrams with compounds, solid solutions and nonstoichiometry.

Structural phase transitions I: Classification, symmetry, thermodynamics.

II: Order¨Cdisorder transitions and order parameters.

III: Landau theory for 1^st and 2^nd order displacive transitions, soft modes.