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Thermogravimetric Analysis of Five Salts of Praseodymium, Neodymium, and Samarium
Author(s) -
WILFONG ROY L.,
DOMINGUES LOUIS P.,
FURLONG LeROY R.
Publication year - 1964
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1964.tb14403.x
Subject(s) - praseodymium , samarium , neodymium , inorganic chemistry , oxalate , chemistry , sesquioxide , thermogravimetric analysis , thermal decomposition , decomposition , sulfate , nuclear chemistry , organic chemistry , laser , physics , optics
The thermal decomposition of the ammonium sul‐fate, carbonate, nitrate, oxalate, and sulfate salts of praseodymium, neodymium, and samarium was investigated thermogravimetrically in the temperature range 25° to 1400° C. Each salt was decomposed at a heating rate of 2.5° C per minute. The pyrolytic sequences have been identified, and the temperatures of formation of intermediates and of the sesquioxides have been determined. The sesquioxide formation temperatures increased in the order samarium, neodymium, and praseodymium irrespective of the anion. The nonstoichiometric ranges between Pr 6 O 11 and Pr 2 O 3 and the extent of these ranges have been determined for oxides derived from the carbonate, nitrate, and oxalate salts of praseodymium. The nonstoichiometric oxides of praseodymium were not observed in the decomposition of the alum and sulfate salts.