A Full abstract was not included by the author of this program.  Here is a summary of the information that he supplied in printed form.

Xphi is a PhiRhoZ correction program.  For a description see:
 "An Accurate Computer Correction Program for Quantitative Electron Probe Microanalysis", Claude Merlet,  Mikrochim. Acta 114/115 363-376 (1994).
Install the program by exploding the auto-unzip file xphiz.exe into a directory on your hard drive (say, c:\xphi).  Install the fonts, FIX8X14.FON and FIX8X16.FON that come with the program in the Windows sytem directory (e.g. in c:\windows\system).  The program is called xphi.exe, add the program to your program manager listing so that you may double click it to run it from the windows shell.

John Mansfield
jfmjfm@umich.edu.