4. Choice of Phi(0) expressions:
(Not applicable if one of the ZAF corrections (#1-6) or PAP was selected for the absorption correction)
1 … Phi(pz) Equation of Reuter
2 … Phi(pz) Equation of Love-Scott
3 … Phi(pz) Equation of Riveros
4 … Phi(pz) Equation of Pouchou and Pichoir
5 … Phi(pz) Equation of Karduck and Rehbach
6 … Phi(pz) Equation of August and Wernisch
7 … Phi(pz) Equation of Packwood
Both #1 and #2 give similar results. The default selection is #2.