Symmetry Frequencies (cm-1) Without Mg With Mg
F2g** 106 click click
171 click click
209 click click
268 click click
320 click click
353 click click
383 click click
495 click click
514 click click
607 click click
655 click click
860 click click
895 click click
1067 click click
Eg** 209 click click
309 click click
336 click click
378 click click
530 click click
635 click click
863 click click
936 click click
A1g 356 click click
567 click click
923 click click

* All the animations are available in .GIF format

** For modes with degenerate movements, just one direction was considered for the animation

A single cell of pyrope has 80 atoms, so a representative portion of the solid was used instead to understand the associated movement with each wavenumber. This portion consists of a central Al with octahedral geometry surrounded by six SiO4 tetrahedral groups. The Mg atoms were excluded for a better appreciation of the system, but they can be seen clicking the links of the third column. The manipulation of the figures was done using Moldraw, and the animations were obtained using POVRAY and Animation Shop3.