rowlesmr
I've recently come across some samples with anisotropic peak broadening that can be fit quite nicely with with the Stephen's peak broadening model, with either a tan(T) or 1/cos(T) dependence.
I've been reading through the paper and the Topas implementation, and have a couple of questions:
* What is the symmetry described by tetragonal high & low and trigonal low & high_2? (trigonal high = trigonal with hexagonal axes)
* What is the constant 0.0018/3.1415927 in Stephens_lor_gauss?