sanisotropy {<sanisotropy-statement>} end
<sanisotropy-statement> :==
class=<classname>
Start a new class which applies to all assignment and force entries
until another class entry is issued.
coefficient <real> <real> <real>
Coefficients: <dfs> <axial> <rhombicity>
where,
dfs = a0
rhombicity = a2/a1
obs_min = a0-a1-3/2*a2
and,
E = a0 + a1*(3*cos(theta)^2-1)+a2*(3/2)*sin(theta)^2*cos(2*phi)
reset
Erases the anisotropy assignment table, but keeps nrestraints the same.