  We report the first extensive model atmosphere and detailed chemical
abundance study of eight RR Lyrae variable stars of c subclass throughout their
pulsation cycles. Atmospheric parameters effective temperature, surface
gravity, microturbulent velocity, and metallicity have been derived. Spectra
for this abundace analysis have been obtained with the echelle spectrograph of
100-inch du Pont telescope at Las Campanas Observatory. We have found
metallicities and element abundance ratios to be constant within observational
uncertainties at all phases of all stars. Moreover, the $\alpha$-element and
Fe-group abundance ratios with respect to iron are consistent with other
horizontal-branch members (RRab, blue and red non-variables). The [Fe/H] values
of these eight RRc stars have been used to anchor the metallicity scale of a
much larger sample of RRc stars obtained with low S/N "snapshot" spectra.
