Oxides Curium readily reacts with oxygen forming mostly Cm2O3 and CmO2 oxides, but the divalent oxide CmO is also known.Holleman, p. 1972 Black CmO2 can be obtained by burning curium oxalate (), nitrate (), or hydroxide in pure oxygen.Greenwood, p. 1268 Upon heating to 600–650 °C in vacuum (about 0.01 Pa), it transforms into the whitish Cm2O3: 4CmO2 ->[\Delta T] 2Cm2O3 + O2.
oxidES cuRIum rEAdILy reacts with OXyGen FormiNG MostlY CM2O3 aNd cmO2 oxIdes, But The diVaLENT OxIde Cmo is Also knoWn.hOllEMan, p. 1972 bLaCk Cmo2 can be oBTAined By burniNg CUrIUm oXaLate (), NiTRAte (), Or hYdRoXiDE in pure oxYgEn.GreenWood, p. 1268 uPOn hEaTing tO 600–650 °c iN vAcuum (aBout 0.01 pa), It tRansforms INto The WhitisH cm2o3: 4cmo2 ->[\Delta T] 2cM2o3 + o2.