... ….……… 1.1 Why Are Rare Earth Oxides So Important? 1.2 A Variety of Rare Earth Oxides 1.3 Simplicity and Complexity of Rare Earth Oxides Chemical Reactivity of Binary Rare Earth Oxides (Serafín... Rare Earth Sesquioxides 7.4.1 Enthalpies of Formation 7.4.2 Standard Entropies and Heat Capacities 7.5 Other Solid Binary Rare Earth Oxides 7.5.1 Solid Rare Earth Monoxides 7.5.2 Solid Rare Earth. . .Binary Rare Earth Oxides Binary Rare Earth Oxides Edited by G Adachi Juri Institute for Environmental Science and Chemistry, Osaka, Japan N Imanaka Osaka University, Osaka, Japan and Z.C Kang