Artigo
Thermal behaviour of the basic carbonates of lanthanum-europium
Registro en:
Thermochimica Acta, v. 254, n. C, p. 209-218, 1995.
0040-6031
10.1016/0040-6031(94)02058-V
WOS:A1995QY63400020
2-s2.0-17044418447
8460531302083773
Autor
Luiz, J. M.
Matos, J. R.
Giolito, I.
Ionashiro, Massao [UNESP]
Resumen
The basic carbonates of lanthanum with 10%, 20%, 50% and 80% of europium were prepared by precipitation from homogeneous solutions via the hydrolysis of urea, without the addition of an auxiliary anion, at two different temperatures. Elemental analysis, complexometric methods, X-ray diffraction patterns, solid state IR absorption, thermogravimetry/derivative thermogravimetry (TG/DTG) and differential thermal analysis (DTA) were used to characterise the compounds and study their thermal behaviour. UNESP,INST QUIM,BR-14800900 ARARAQUARA,SP,BRAZIL UNIV SAO PAULO,INST QUIM,BR-01498970 SAO PAULO,SP,BRAZIL