Spectrum MIR absorbance spectrum of Portlandite at 25°C under vacuum Spectrum MIR absorbance spectrum of Portlandite at 25°C under 2b CO2 gas - 4 min Spectrum MIR absorbance spectrum of Portlandite at 25°C under 2b CO2 gas - 10 min Spectrum MIR absorbance spectrum of Portlandite at 25°C under 2b CO2 gas - 20 min Spectrum MIR absorbance spectrum of Portlandite at 25°C under 2b CO2 gas - 30 min Spectrum MIR absorbance spectrum of Portlandite at 25°C under 2b CO2 gas - 40 min Spectrum MIR absorbance spectrum of Portlandite at 25°C under 2b CO2 gas - 50 min Spectrum MIR absorbance spectrum of Portlandite at 25°C under 2b CO2 gas - 70 min Spectrum MIR absorbance spectrum of Portlandite at 25°C under 2b CO2 gas - 90 min Spectrum MIR absorbance spectrum of Portlandite at 25°C under 2b CO2 gas - 110 min Spectrum MIR absorbance spectrum of Portlandite at 25°C under 2b CO2 gas - 185 min Spectrum MIR absorbance spectrum of Portlandite at 25°C under 2b CO2 gas - 215 min Spectrum MIR absorbance spectrum of Portlandite at 25°C under 2b CO2 gas - 240 min Spectrum MIR absorbance spectrum of Portlandite at 25°C under 2b CO2 gas - 300 min Spectrum MIR absorbance spectrum of Portlandite at 25°C under 2b CO2 gas - 360 min Spectrum MIR absorbance spectrum of Portlandite at 25°C under 2b CO2 gas - 420 min