  We report interstellar FeII and SiII column densities toward six translucent
sight lines (A_V >~ 1) observed with the Space Telescope Imaging Spectrograph
(STIS). The abundances were determined from the absorption of SiII] at 2335
Angstroms, and several weak Fe transitions including the first reported
detections of the 2234 Angstrom line. We derive an empirical f-value for the
FeII 2234 Angstrom transition of log(f lambda) = -1.54 +/- 0.05. The observed
sight lines sample a variety of extinction characteristics as indicated by
their R_V values, which range from 2.6 - 5.8. The dust-phase abundances of both
Si and Fe are positively correlated with the small-grain population (effective
radii smaller than a few hundred micron) toward the targets. The physical
conditions along the sight lines suggest that this relationship may be due to
differences in the survival of small particles in some interstellar
environments. The chemical composition of the small grains could either
resemble dust mantles or be silicate rich.
