The assignments were made on the basis of relatively low-level calculations carried out
using the Gaussian 94 program suite.
(Restricted Hartree-Fock calculations with 3-21G* basis.) The experimental Raman spectra were
then matched to the overall patterns of the *ab initio* calculations. In general the
frequencies were calculated frequencies were over-estimated. The small unassigned peaks in the spectrum in the region
1600 cm^{-1} and 2800 cm^{-1} are most probably combination bands.

The animations of adamantane and diamantane have been produced using the optimized
geometry and maximum displacements
from the ab initio calculations. The individual frames have been calculated using a
simple sinusoidal interpolation. The animation of the diamond lattice uses the fact that
all the individual unit cells are in phase with one another (i.e. **k**=0). The diamond
lattice can be thought of as two face centered cubic lattices and in this case the two
lattices as a whole are moving relative to one another. Again the animation uses a simple
sinusoidal interpolation for each frame.