Interactive Tutorial about Diffraction
Interactive example: HK plane simulator
The main emphasis of this exercise is to draw
different hkl planes into a crystal structure and to compare these
to the corresponding Bragg reflection. In this 2-dimensional example,
the planes are obviously reduced to hk lines.
This time, the controls on the left will create a grid of 5*5 Pb atoms.
You can still set the ratio
of the separation distance and angle between the axes. This
defines the structure which than can be shifted and rotated with
respect to the real space coordinate system.
The diffraction pattern of the resulting structure is calculated.
Start exploring and try to answer the question below:
The program will draw the crystal structure in the left image, and the
corresponding diffraction pattern in the right image. All atoms will
be drawn in blue, except the atom at the origin of the unit cell which
is green. The unit cell is outlined in red. The corresponding unit
cell in reciprocal space is drawn in blue.
The hk planes in direct space are drawn as green lines. The thick green
line represents a vector normal to the planes. The corresponding
vector to the Bragg reflection is drawn in green as well.
Once you are done, click
here to verify your answers.
Once you are done, click here to verify your answers.
|© Th. Proffen and R.B. Neder, 2003|