ADSORPTION OF AR, N2, AND N-C4H10 ON MGO SMOKE, CAF2, AND GRAPHITIZED CARBON

Crystalline MgO smoke produced by burning Mg ribbon in pure oxygen is primarily cubic crystallites with (100) faces. Exposure to the atmosphere with subsequent outgassing leaves behind an imperfect surface. Adsorption isotherms indicate definite signs of adsorbate-adsorbate interaction despite residual heterogeneities. Heterogeneities are explained in terms of surface carbonate and hydroxyl groups. Isotherms on known isoenergetic substrates are compared with MgO. © 1969.