2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/9067We present high resolution Spitzer spectroscopy of several pointings in the outflow of the Red Rectangle. Besides the resonances due to the C-rich PAHs, the spectra show a wealth of new emission bands, in particular in the 13-19.5 micron range. We argue that these bands are due to solid state components, and show that simple oxides of a varying composition show a good match to the data. The presence of these O-rich species in the supposedly C-rich outflow is unexplained.conference proceedings of Spitzer New Views of the Cosmos, 4 pagesAstrophysicstext