  Here we study a 1-200 keV energy spectrum of the black hole binary Cygnus X-1
taken with NuSTAR and Suzaku. This is the first report of a NuSTAR observation
of Cyg X-1 in the intermediate state, and the observation was taken during the
part of the binary orbit where absorption due to the companion's stellar wind
is minimal. The spectrum includes a multi-temperature thermal disk component, a
cutoff power-law component, and relativistic and non-relativistic reflection
components. Our initial fits with publicly available constant density
reflection models (relxill and reflionx) lead to extremely high iron abundances
(>9.96 and 10.6(+1.6)(-0.9) times solar, respectively). Although supersolar
iron abundances have been reported previously for Cyg X-1, our measurements are
much higher and such variability is almost certainly unphysical. Using a new
version of reflionx that we modified to make the electron density a free
parameter, we obtain better fits to the spectrum even with solar iron
abundances. We report on how the higher density (n_e = (3.98(+0.12)(-0.25))E20
cm-3) impacts other parameters such as the inner radius and inclination of the
disk.
