THE THERMOCHEMICAL PROPERTIES OF Y2SI2O7 AND DY2SI2O7

Authors
CORDFUNKE EHP BOOIJ AS VANDERLAAN RR
Citation
Ehp. Cordfunke et al., THE THERMOCHEMICAL PROPERTIES OF Y2SI2O7 AND DY2SI2O7, Journal of Chemical Thermodynamics, 30(2), 1998, pp. 199-205
Citations number
14
Categorie Soggetti
Chemistry Physical
Journal title
Journal of Chemical Thermodynamics → ACNP
ISSN journal
00219614
Volume
30
Issue
2
Year of publication
1998
Pages
199 - 205
Database
ISI
SICI code
0021-9614(1998)30:2<199:TTPOYA>2.0.ZU;2-4
Abstract
The enthalpy increments of Y2Si2O7 and Dy2Si2O7 have been measured by drop-calorimetry from T = (516.7 to 928.4) K, and T = (516.7 to 918.2) K, respectively. The standard molar enthalpy of formation of monoclin ic Y2Si2O7 has been deduced from its enthalpy of solution in (6.20 mol .dm(-3) HCl + 0.147 mol.dm(-3) HF)(aq), and the value Delta(f)H(m)(o)( 298.15 K) = -(3854.8 +/- 6.8) kJ.mol(-1) has been obtained. For Dy2Si2 O7 the standard molar enthalpy of formation -(3776.1 +/- 4.6) kJ.mol(- 1) has been estimated. (C) 1998 Academic Press Limited.