Definition:
A label identifying the rotation component around a fixed point of a given rigid group whose modulation is being parameterized by Fourier series. a, b and c are the basic lattice vectors of the reference structure. For composites they refer to the reference structure of each subsystem. a~1~, a~2~ and a~3~ are defined by _atom_sites_rot_Fourier_axes_description.
Appears in list containing _atom_site_rot_Fourier_id
The data value must be one of the following:
x | rotation around the a axis |
y | rotation around the b axis |
z | rotation around the c axis |
a1 | rotation around an arbitrary a1 axis |
a2 | rotation around an arbitrary a2 axis |
a3 | rotation around an arbitrary a3 axis |
Type: char
Category: atom_site_rot_Fourier
Copyright © 2005 International Union of Crystallography