Chemistry Reference
In-Depth Information
Fig. 6.1 Scheme of “thinking in models” according to Steinbuch [
3
]
Reality
l
Imagination
l
Real models
"interference pattern
of X-ray reflexes
of a salt crystal
(Laue diagram)"
l
l
3D-calculation of interferences
of waves
balls, glue,
sticks
l
l
l
l
l
l
l
filter, which only
lets through the
essentials
l
l
l
l
3-dimensional
symmetrically
l
l
arranged interference centres
l
l
l
in the salt crystal
l
l
Fig. 6.2 Scheme of “thinking in models” applied to Laue's way of X-ray analysis
structure function as diffraction centers for the X-ray radiation beam (abstract
mental model).
For the illustration of this mental model, irrelevant components such as balls,
sticks and glue can be used for the construction of display models: sphere packing
or crystal structure models (see Fig.
6.3
). In addition to sphere packing and crystal
structure models, the resulting display model for the structure of crystals can also be
a unit cell only (see Fig.
6.3
).
