# The Interactive Structure Factor Tutorial

Welcome to the structure factor tutorial! The aim of this tutorial is
to learn about structure factors, phases, symmetry, and the
relationship between the structure factors and the electron density
map. The tutorial uses an interactive tool, the `structure factor
applet'.

The structure factor applet has four windows. Top left is the control
window, in which you can select reflections and set their values by
entering values in the text boxes. Several buttons allow you to modify
the structure factor values in the map and the diffraction
pattern. Top right is the structure factor window, which shows the
current diffraction pattern. Bottom left is the reflection window,
with which you can view or modify magnitudes and phases. Bottom right
is the map window, showing the unit cell and electron density.

Amplitudes and phases are encoded as colours using the same scheme as
the Fourier picturebook.

### Exercises

- Miller Indices.
- Structure factors (1).
- Structure factors (2).
- Symmetry (1).
- Symmetry (2).
- Symmetry (3).
- Pattersons (1).
- Pattersons (2).
- Direct Methods.

Back
to my YSBL page.

Kevin Cowtan: | |
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