XFIT for Windows is a suite of X-ray Absorption Fine Structure (XAFS) analysis programs for PCs using the Windows 95 operating system. The Windows version of XFIT was developed at the University of Sydney as a joint project with, and funded by, the Australian Synchrotron Research Program Inc.

It incorporates the following features:

• A graphical user interface driven averaging and spline program.
• A choice between ab initio and empirical calculations of XAFS.
• Single and multiple scattering XAFS calculated using the FEFF routines.
• Fourier filtering of both experimental and calculated XAFS.
• A generalised formalism for parameter constraints and restraints.
• Estimation of random errors by a Monte-Carlo technique.
• The ability to fit a model simultaneously to several XAFS data sets.
• The ability to fit a model with more than one absorption site.
• A user-friendly interface.

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