MIRI and Spitzer spectra of PDS 70 and their shapes of 10 μm silicate bands. Upper: MIRI spectrum in blue and Spitzer spectrum in orange. The light orange shows the full wavelength range of the Spitzer spectrum. Around 10 μm, the MIRI spectrum has a higher flux and broader silicate band, while the Spitzer spectrum shows higher flux levels beyond 12 μm. Lower: band strength at 9.8 μm and the shape of 10 μm silicate band. Gray dots are disks in the CASSIS database with low-resolution spectra. The blue cross is the MIRI spectrum, while the orange cross is the Spitzer spectrum.