User-Visible Files:

diffraction.py - x-ray diffraction in the independent atom model (IAM)
formfactor.py - AtomicFormFactor and standard table thereof

Utility Files:
lebedev.py - Lebedev quadrature grids for S(2)
legendre.py - Legendre polynomials and zonal harmonics
rotation.py - Rotation quadratures for SO(3)
