Self-Diffusion Coefficient of Liquid Alkali Metals
Sant K. Srivastava* [a] and Kishor G. Kolhe [b]* Author for corresponding; e-mail address: markcom@sancharnet.in
Volume: Vol.31 No.2 May 2004
Research Article
DOI:
Received: 27 June 2003, Revised: -, Accepted: 21 April 2004, Published: -
Citation: Srivastava S.K. and Kolhe K.G., Self-Diffusion Coefficient of Liquid Alkali Metals, Chiang Mai Journal of Science, 2004; 31(2): 125-129.
Abstract
Self-diffusion coefficient ‘D’ of liquid metals has been evaluated under pseudopotential formalism and liquid state dynamics. A suitable expression of D (D=KvsβLTm/rs) of Swalin is used, during studies of melting behaviours of metals. We have reassessed various concepts of Ziman, Ascarelli – Harrisson – Paskin, Enderby – March – Tosi and Lindemann criteria. A new concept of isothermal compressibility βL [βL-1 =( βLpl)-1 + (βLst )-1 ] of liquid metals is derived in terms of plasma ( βLPl ) and band structural (βLst) contributions of compressibilities. Our methodology presents good results of self-diffusion coefficeient D of liquid alkali metals.