An Introduction to Neutron Scattering - Spallation Neutron Source

The Rietveld Model for Refining Powder Patterns
I c = I o {Sk h F 2 h m h L h P(D h ) + I b }
I o - incident intensity - variable for fixed 2Q
k h - scale factor for particular phase
F 2 h
- structure factor for particular reflection
m h - reflection multiplicity
L h - correction factors on intensity - texture, etc.
P(D h ) - peak shape function – includes instrumental resolution,
crystallite size, microstrain, etc.