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Relations for the high‐pressure melting temperature of alkali halides based on the diffusional driving force models: NaCl as an example
Author(s) -
Fang ZhengHua
Publication year - 2004
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200302017
Subject(s) - halide , alkali metal , thermodynamics , isothermal process , melting temperature , chemistry , volume (thermodynamics) , melting curve analysis , melting point , materials science , inorganic chemistry , physics , composite material , organic chemistry , polymerase chain reaction , biochemistry , gene
Two different diffusional driving force models were presented by Sharma et al. [Indian J. Pure Appl. Phys. 29 , 637 (1991)] and Singh [J. Phys. Chem. Solids 63 , 1935 (2002)], respectively, for estimating the zero‐pressure melting temperatures of alkali halides. Whether the two models are suitable for the analysis of the high‐pressure melting temperature of alkali halides is examined in this paper. It is shown that, supposing that the product of the thermal expansivity and the isothermal bulk modulus is inversely proportional to the volume along the melting curve, then the two diffusional force models are equivalent and the same relation for the high‐pressure melting temperature of solids may be derived. The reasonableness of this assumption is supported by the analysis and test on NaCl up to 1 Mbar, and is presented here. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)