V. Jordanovska et J. Siftar, THERMAL-DECOMPOSITION OF DOUBLE RARE EARTH(III) MONOMETHYLAMMONIUM SULFATES WITH GENERAL EMPIRICAL-FORMULA CH3NH3LN(SO4)2.3H2O (LN = LA-ER AND Y), Journal of thermal analysis, 39(3), 1993, pp. 281-288
Double rare earth(III) monomethylammonium sulfates with general empiri
cal formula CH3NH3Ln(SO4)2.3H2O (Ln = La-Er and Y) were synthesized an
d examined by X-ray powder diffraction, TG, DTG and DTA in the tempera
ture range from 25-degrees-C to 700-degrees-C, and chemical analysis.
It was found that these compounds are isomorphous and decompose to rar
e earth sulfate at 700-degrees-C.