ABSTRACT

Ternary oxides, RCoO3(s) (R = La, Nd, Sm Eu, Gd, Tb, Dy and Ho), have been prepared by citrate nitrate gel combustion route and characterized by X-ray diffraction analysis. Heat capacities of these compounds have been measured in the temperature range from 130 to 850K using a heat flux type differential scanning calorimeter. Heat capacity versus temperature plots for these compounds indicated broad humps in the temperature range from 450 to 780K suggesting electronic transitions in these compounds accompanied by large entropy increments. The transition temperatures showed increasing trend with decrease in ionic radii of the lanthanide ion.

Compounds

#	Formula	Name
1	CoLaO3	cobalt lanthanum oxide
2	CoNdO3	cobalt(III) neodymium(III) oxide
3	CoO3Sm	cobalt samarium oxide
4	CoEuO3	cobalt europium oxide
5	CoGdO3	cobalt gadolinium oxide
6	CoO3Tb	cobalt terbium oxide CoTbO3
7	CoDyO3	cobalt dysprosium oxide
8	CoHoO3	cobalt holmium oxide

Datasets

The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type	Compound-#	Property	Variable	Constraint	Phase	Method	#Points
POMD	1	Molar heat capacity at constant pressure, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Large sample (1 g) DSC	41
POMD	2	Molar heat capacity at constant pressure, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Large sample (1 g) DSC	41
POMD	3	Molar heat capacity at constant pressure, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Large sample (1 g) DSC	41
POMD	4	Molar heat capacity at constant pressure, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Large sample (1 g) DSC	41
POMD	5	Molar heat capacity at constant pressure, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Large sample (1 g) DSC	41
POMD	6	Molar heat capacity at constant pressure, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Large sample (1 g) DSC	41
POMD	7	Molar heat capacity at constant pressure, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Large sample (1 g) DSC	41
POMD	8	Molar heat capacity at constant pressure, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Large sample (1 g) DSC	41

Thermodynamics Research Center / ThermoML | Thermochimica Acta

Heat capacities of RCoO3(s) (R = La, Nd, Sm Eu, Gd, Tb, Dy and Ho) by differential scanning calorimetry

Patil, A.[Abhay], Parida, S. C., Dash, S.[Smruti], Venugopal, V.

ABSTRACT