Thermochemistry of double carbonates in the K2CO3-CaCO3 system

Enthalpies of formation, ΔH, of the double carbonates K2Ca(CO3)2 (with two polymorphs, butschliite and fairchildite) and K2Ca2(CO3)3 from the components K2CO3 and CaCO3 were determined at 298 K by drop solution calorimetry in molten 2PbO·B2O3 at 974 K. The enthalpies of formation were -38.7±3.2 kJ/m...

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Veröffentlicht in:	The American mineralogist 1997-05, Vol.82 (5-6), p.546-548
Hauptverfasser:	Navrotsky, Alexandra, Putnam, Robert L, Winbo, Camilla, Rosén, Erik
Format:	Artikel
Sprache:	eng
Schlagworte:	Calorimetry Carbonates Chemistry enthalpy entropy Mineralogy Minerals nonsilicates phase equilibria solid solution thermodynamic properties
Online-Zugang:	Volltext
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