Martin Kroeker and I have been asked to add an option to our crystal
structure drawing program DRAWxtl that would represent magnetic spin
vectors with an arrow. Because I don't really understand magnetic space
groups, I would rather not implement a full-blown space-group generator.
Would the following parameters be useful in describing the position and
orientation of such spins?
1. fractional coordinates of nucleus in nuclear unit cell.
2. angles from vector to z and x axes - essentially chi and phi
3 3 x 3 matrix relating magnetic unit cell to the nuclear one
If there are a better set of parameters, I would appreciate learning of them.
Thanks,
Larry Finger
