DIFFERENTIAL THERMAL ANALYSIS OF THE OXALATES OF LANTHANUM, CERIUM AND THORIUM

Journal Article · Mon Jan 01 04:00:00 EST 1962 · J. Sci. Ind. Res. (India)

OSTI ID:4741745

Srivastava, O K; Murthy, A R.V.

Decomposition of hydrates of lanthanum, cerium, and thorium oxalates was studied by differenti al thermal analysis (D.T.A.) using a rate of heating of 23-- 25 deg C/min. The endothermic peaks observed in the D.T.A. curves indicate the different stages in the hydration and decomposition of the oxalates. Phase changes in the oxide could not be detected as the oxidation of carbon is pronounced after 600 deg C. In the case of thorium oxalate, the oxidati on of carbon starts at as low a temperature as 480 deg C, probably due to catalytic oxidation. Activation energies calculated for each of the different reactions show that they are smaller for dehydration reactions as compared to decomposition reactions. (auth)

• Research Organization: Department of Inorganic and Physical Chemistry, Indian Inst. of Science, Bangalore
• NSA Number: NSA-17-004543
• OSTI ID: 4741745
• Journal Information: J. Sci. Ind. Res. (India), Journal Name: J. Sci. Ind. Res. (India) Vol. Vol: 21B
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

AFTERGLOW
ATOMS
CARBON
CATALYSIS
CERIUM COMPOUNDS
CHARGED PARTICLES
CHEMISTRY
CONVERSION
DECAY
DECOMPOSITION
DENSITY
DIFFUSION
ELECTRIC DISCHARGES
ELECTRONS
ENERGY LEVELS
FREQUENCY
GLOW DISCHARGES
HELIUM
INTERACTIONS
IONS
LANTHANUM COMPOUNDS
LOSSES
LUMINESCENCE
MANY BODY PROBLEM
MASS SPECTROMETERS
MEASURED VALUES
MICROWAVES
MOBILITY
NUMERICALS
OXALATES
OXIDATION
PHASE DIAGRAMS
PLANNING
PRESSURE
PRODUCTION
QUANTITATIVE ANALYSIS
QUANTUM MECHANICS
THERMODYNAMICS
THORIUM COMPOUNDS
VELOCITY