Fig. 1 Self-diffusion coefficients of (+) methane, (x)ethane, (Δ)propane [7], and of (○)methanol [8] in NaCaA in comparison with the first results obtained with two different specimens of cation-free Si-LTA, viz. of (■)ethane and (▲)propane in specimen I and of (□)ethane, (⃟)ethene and (●)methanol in specimen II. 1. Introduction In elucidating the origin of the discrepancies in the message of d...