*Standard*

`rpath`

The RPATH card determines the maximum effective (half-path)
distance, `rpath`, of a given path. RPATH is equivalent to
the RMAX card in the FEFF7 code. We changed the name because it provides
a clearer distinction between the max distance in the MS path expansion
and that for FMS calculations.
Typically `rpath` is needed for EXAFS calculations only to
set limits on the number of calculated paths. Note that
`rpath` is one-half of the total path length in
multiple-scattering paths. Setting this too large can cause the
heap in the pathfinder to fill up. Default is `rpath` = 2.2
times the nearest neighbor distance. Since the multiple scattering
expansion is unstable close to the absorption edge, the path (MS)
expansion should be used only for EXAFS calculations or for
diagnosing the XANES or DOS calculations. If you use FMS for XANES
calculations, better results are obtained without the MS
contribution. For EXAFS analysis this card is extremely useful,
since it cuts off long paths which contribute only at high
R values in R-space.
* include MS paths with effective length up to 5.10 Ang
RPATH 5.10