Spectrum Raw MIR absorbance spectrum of Renazzo matrix grain (fragment #1) under vacuum at 22°C Spectrum Raw MIR absorbance spectrum of Renazzo matrix grain (fragment #2) under vacuum at 22°C Spectrum Raw MIR absorbance spectrum of Renazzo matrix grain (fragment #3) under vacuum at 22°C Spectrum Raw MIR absorbance spectrum of Renazzo matrix grain (fragment #5) under vacuum at 22°C Spectrum Raw MIR absorbance spectrum of Renazzo matrix grain (fragment #7) under vacuum at 22°C Spectrum Raw MIR absorbance spectrum of Renazzo matrix grain (fragment #8) under vacuum at 22°C Spectrum Raw MIR absorbance spectrum of Renazzo matrix grain (fragment #9) under vacuum at 22°C Spectrum Raw MIR absorbance spectrum of Renazzo matrix grain (fragment #10) under vacuum at 22°C

Spectrum Raw MIR absorbance spectrum of Renazzo matrix grain (fragment #1) under vacuum at 300°C Spectrum Raw MIR absorbance spectrum of Renazzo matrix grain (fragment #5) under vacuum at 300°C Spectrum Raw MIR absorbance spectrum of Renazzo matrix grain (fragment #6) under vacuum at 300°C Spectrum Raw MIR absorbance spectrum of Renazzo matrix grain (fragment #7) under vacuum at 300°C Spectrum Raw MIR absorbance spectrum of Renazzo matrix grain (fragment #9) under vacuum at 300°C Spectrum Raw MIR absorbance spectrum of Renazzo matrix grain (fragment #10) under vacuum at 300°C

Spectrum Normalized and baseline-corrected MIR absorbance spectrum of Renazzo matrix grain (fragment #1) under vacuum at 300°C Spectrum Normalized and baseline-corrected MIR absorbance spectrum of Renazzo matrix grain (fragment #5) under vacuum at 300°C Spectrum Normalized and baseline-corrected MIR absorbance spectrum of Renazzo matrix grain (fragment #6) under vacuum at 300°C Spectrum Normalized and baseline-corrected MIR absorbance spectrum of Renazzo matrix grain (fragment #7) under vacuum at 300°C Spectrum Normalized and baseline-corrected MIR absorbance spectrum of Renazzo matrix grain (fragment #9) under vacuum at 300°C Spectrum Normalized and baseline-corrected MIR absorbance spectrum of Renazzo matrix grain (fragment #10) under vacuum at 300°C