A note on Guggenheim’s theory of strictly regular binary liquid mixtures

Abstract This note attempts to revise and extend the formulae proposed by Guggenheim (1935) in his theory of a special (hypothetical) type of liquid mixture which, in the account of Guggenheim’s paper given by Fowler (1936), is called strictly regular. According to the definitions in these sources a binary liquid mixture is said to be strictly regular if (i) there is no volume change on mixing, whatever the relative amounts of the two components, (ii) it possesses a definite co-ordination number, г say, so that each molecule, of either kind, in the liquid has precisely г (nearest) neighbours.