  The spectrum of HV 2310, an evolved star in the Large Magellanic Cloud, taken
with the Infrared Spectrograph (IRS) on the Spitzer Space Telescope reveals the
presence of an optically thin shell of silicate dust with unusual spectral
structure in the 10 um feature, with an emission peak at 9.7 um, a saddle at
10.4 um, and an extended shoulder to 11.2 um. This structure is similar to
spectra from crystalline silicate grains, and of the available optical
constants, forsterite provides the best fit. The spectrum also shows structure
at 14 um which may arise from an unidentified dust feature.
