Li5GaO4 was tested as a possible CO2 captor. Li5GaO4 was synthesized by solid-state reaction, structurally characterized, and then thermally treated under a CO2 flow, from 30 to 900 degrees C, having the highest CO2 chemisorption at around 709 degrees C. The results clearly showed that Li5GaO4 is able to trap CO2 chemically in two different steps. The CO, quantity trapped was equal to 8.9 mmol g(-1), which is considerably high in comparison to other ceramics.