Distinzione di termini Ba-zeolitici attraverso il loro comportamento diffrattometrico e termico dopo scambio con K e Ba

Distinguished five groups of samples, characterized by the prevailing, each time, of Ba-phillipsite or wellsite or harmotome compositions. The diffractometric behaviour shows good correlations with the BaO content of natural samples. The genetic features of the sedimentary deposits of Ba-zeolitic materials and the coexistence of different compositions into the same deposit, were discussed