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This is a comment on: J. Nery, Y. Mascarenhas, T. Bonagamba, N. Mello, E. Souzy-Aguiar Location of cerium and lanthanum cations in CeNaY and LaNaY after calcination Zeolites 1997 page 44 volume 18  DOI: 10.1016/S0144-2449(96)00094-2

Rietveld refinements   published on Thursday, 04-Jun-09 15:29:29 CEST by Chrysler

A few remarks and questions concerning the Rietveld Refinements: -The fits were done in the range of ~8 to 80 degrees, the peak at ~6° 2Theta was simply left out. For what reason? - The background fitting of the steamed and calcined sample looks horrible to me. This might explain the worse Rb compared to the non heat treated samples at first. - I'm not a friend of overall isotropic B Parameters. Why not refine the temperature parameter of the heavy scatteres La/Ce? Regards Chrysler

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