Quasicrystal Reflection Generator QREFGEN© Steffen Weber 1996-98 |
(page last modified on October 14,1996)
This program is a utility for producing sets of possible wave
vectors for several quasicrystal space groups. It is possible to
constrain the theta range and the maximum internal component q_{i}
. The program also tries to obey the corresponding reflection
conditions. The criteria for that are based on the following two
papers: (1) A.Yamamoto: Crystallography of Quasiperiodic
Crystals, Acta.Cryst.(1996), A52,509-560; (2) Rabson, Mermin,
Rokshar, Wright: The space groups of axial crystals and
quasicrystals, Rev.Mod.Phys.(1991), Vol.63,No.3,699
If you find any bug in the extinctions please let me know.
spot radius
is inversely proportional to the internal space component of the
wave vector
it is known
that small internal components q_{i} give stronger
reflections
octagonal (0.layer) | decagonal (0.layer) | dodecagonal (0.layer) |
Release Notes
- released October,14,1996
download QREFGEN(92Kb)