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HERO ID
6878332
Reference Type
Journal Article
Title
THERMODYNAMIC PROPERTIES OF WOLLASTONITE, PSEUDOWOLLASTONITE AND CASIO3 GLASS AND LIQUID
Author(s)
Richet, P; Robie, RA; Hemingway, BS; ,
Year
1991
Is Peer Reviewed?
Yes
Journal
European Journal of Mineralogy
ISSN:
0935-1221
Publisher
E SCHWEIZERBART'SCHE VERLAGS
Location
STUTTGART
Page Numbers
475-484
Web of Science Id
WOS:A1991FP53900001
Abstract
Available thermodynamic data for wollastonite, pseudowollastonite and CaSiO3 glass and liquid have been reviewed and complemented to obtain a consistent set of thermodynamic properties : heat capacities, entropies, and temperatures and enthalpies of transition and fusion. Drop-calorimetry experiments for wollastonite between 800 and 1350 K show a first-order phase transition at 995 K with a small enthalpy of transition of 200 J/mol. From low-temperature C(p) measurements between 10 and 370 K for CaSiO3 glass, the absolute and configurational entropies of the amorphous phases have been determined. The differences between the properties of wollastonite and pseudowollastonite are greater than suggested by current polyhedral modeling of the heat capacity.
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