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Thermal Decomposition of Rare Earth Metal Oxalates. I. Oxalates of Lanthanum, Praseodymium and Neodymium
Author(s) -
Moosath S. S.,
Abraham John,
Swaminathan T. V.
Publication year - 1963
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.19633240110
Subject(s) - lanthanum , praseodymium , anhydrous , thermal decomposition , oxalate , decomposition , lanthanide , chemistry , inorganic chemistry , neodymium , thermogravimetry , lanthanum oxide , metal , oxide , organic chemistry , ion , laser , physics , optics
Thermal decomposition studies of the oxalate‐hydrates of lanthanum, praseodymium and neodymium on a Stanton thermobalance have shown that these form a group, giving stable intermediate products (basic carbonates) before final decomposition t o the oxide. Intermediate weight levels corresponding to lower hydrates have not been obtained. The final stage of dehydration of these oxalates is followed by rapid decomposition, indicating that the anhydrous oxalates are unstable. The mechanism of decomposition of lanthanum oxalate is investigated in detail. modified decomposition procedure on the thermobalance has, however, shown that anhydrous lanthanum oxalate is fairly stable at 300°C.