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The crystalline silicates features are mainly reflected in infrared bands.The Spitzer Infrared Spectrograph (IRS) collected numerous spectra of variousobjects and provided a big database to investigate crystalline silicates in awide range of astronomical environments. We apply the manifold rankingalgorithm to perform a systematic search for the spectra with crystallinesilicates features in the Spitzer IRS Enhanced Products available. In total,868 spectra of 790 sources are found to show the features of crystallinesilicate. These objects are cross-matched with the SIMBAD database as well aswith the Large Sky Area Multi-Object Fibre Spectroscopic Telescope(LAMOST)/DR2. The average spectrum of young stellar objects show a variety offeatures dominated either by forsterite or enstatite or neither, while theaverage spectrum of evolved objects consistently present dominant features offorsterite in AGB, OH/IR, post-AGB and planetary nebulae. They are identifiedoptically as early-type stars, evolved stars, galaxies and so on. In addition,the strength of spectral features in typical silicate complexes is calculated.The results are available through CDS for the astronomical community to furtherstudy crystalline silicate.

A systematic search for the spectra with features of crystalline silicates in the Spitzer IRS Enhanced Products