The decarbonation and heat capacity of ZnCO 3

Details The decarbonation and heat capacity of ZnCO 3 The decarbonation and heat capacity of ZnCO 3

Feb 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987gecoa..51..261h&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 51, Issue 2, pp.261-265

Physics

2

Scientific paper

The decarbonation curve for ZnCO 3 has been determined in the pressure range 3-20 kbar by using a combination of cold-seal vessels and piston-cylinder apparatus with NaCl assemblies. Heat capacities for both synthetic and natural ZnCO 3 samples were measured by differential scanning calorimetry at temperatures ranging from 340 to 497 K. The results of these experiments indicate that the enthalpy of formation for smithsonite, H f (1,298.15), is approximately -817. kJ/mol. which is about 4 kJ more negative than most tabulated values.

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