Observed N-band spectrum of IRAS 11472–0800 is shown as the solid black line. The different lines represent our decomposition of the different dust species contributing to the silicate emission feature. The dashed line represents the continuum, the dashed-dotted line the contribution of large grains of amorphous silicates and the + are large (lower) and small (upper) grains of forsterite, the Mg-rich end member of the crystalline olivine. The total model spectrum is depicted in red.