Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 44: Issue 4
Decarbonation curves and associated thermodynamic data for synthetic Cd-dolomites CdMg(CO3)2, CdMn(CO3)2 and CdZn(CO3)2
Authors:
J. Tareen Department of Geology, University of Mysore, 570 006 Mysore, India

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A. Fazeli Department of Geology, University of Mysore, 570 006 Mysore, India

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B. Basavalingu Department of Geology, University of Mysore, 570 006 Mysore, India

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G. Bhandige Department of Chemistry, Regional College of Education (NCERT), Mysore, India

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Pages:
937–954
Online Publication Date:
09 Jan 2007
Publication Date:
01 Apr 1995
Article Category:
Research Article
DOI:
https://doi.org/10.1007/bf02547277
Keywords:
Cd-dolomites; decarbonation; synthetic dolomites; thermodynamic data
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Abstract  

Decarbonation curve for the synthetic dolomite analogues; (Cd-dolomites) were determined for CdMg(CO3)2, CdMn(CO3)2 and CdZn(CO3)2 under CO2 pressure of up to 2.5 kbar. All the three double carbonates were completely disordered at the decomposition temperatures and hence the thermodynamic data (Standard enthalpy; ΔHfo, Standard free energy; ΔGfo) retrieved from the univariant decarbonation curve corresponds to the disordered phases. They are:

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The mixing enthalpies and free energies for the formation of the disordered 1∶1 solid solution phases are:
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The thermodynamic data (ΔHfo, ΔGfo and ΔHro, ΔGro) showed a positive correlation with the decomposition temperatures. The mixing energies of the disordered double carbonates also show a direct correlation with the cationic size differences.

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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