TY - CPAPER TI - Structural study by x-rays powder diffraction and rietveld method of y zeolites modified by rare earth cations PY - 1995 AU - Nery, J G AU - Mascarenhas, Yvonne Primerano AU - Aguiar, E F S T2 - European Powder Diffraction Conference J2 - Abstracts PP - Chester ER -