Sesquioxide physical properties

Synonyms auric oxide gold trioxide gold oxide gold sesquioxide Physical Properties... 

Of the sesquioxides perhaps least is known about Ce203. Unless it is completely stoichiometric (and A-form) it can be pyrophoric hence preparation and protection from oxygen during study requires serious attention. Sata and Yoshimura (1968a, b) have prepared this material and have studied its chemical and physical properties including its melting point, thermal expansion, and electrical and magnetic properties. 

Structural, physical and chemical properties of bulk rare earth oxides can be found in Chapter 27, Volume 3 of this series and have been compiled with a view towards catalysis in a recent review by Rosynek (1977). An important parameter for the catalytic behavior of rare earth oxides is their basicity. The basicities of rare earth oxides resemble those of the alkaline-earth oxides, and scale directly with the respective cation radii. Thus, La203 shows the strongest basicity and SC2O3 the weakest, with sesquioxide basicities decreasing smoothly along the lanthanide series going from La to Lu. This periodic trend allows one to study the influence of subtle variations in basicity on catalytic behavior in a class of related materials with similar electronic and geometrical structure. 

Synonyms Arcenous Acid Arcenous Acid Anhydride Arcenous Oxide Arsenic Sesquioxide White Arsenic Chemical Formula As O, Iii) Observable Characteristics — Physical State (as normally shipped) Solid Color. White (5dor Like garlic none (iii) Riysical and Chemical Properties — Physical State at 15 "C and I atm. Solid Molecular Weight 197.8 Boiling Point at I... 

Physical and thermodynamic properties of rare earth sesquioxides. 

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