UNDER a pressure of carbon dioxide of 39.5 atmospheres, thermal dissociation of calcium carbonate takes place at 1,240°–1,242° C. 1,2 with the formation of a eutectic melt of lime and calcium ...

THE barium oxide–carbon, dioxide system has been examined at pressures of carbon dioxide up to 450 atm.1 and is similar in many respects to that of calcium oxide and carbon dioxide2.