Accession Number : AD0263341

Title :   SYMMETRY OF CONFIGURATIONAL ENTROPY IN LATTICE STATISTICS

Corporate Author : MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB

Personal Author(s) : KLEINER,W.H.

Report Date : 22 MAR 1961

Pagination or Media Count : 1

Abstract : An investigation i made of the general conditions under which the configurational entropy of a binary solid solution is symmetrical with respect to composition about the 50-50 composition point. Spin coordinate and occupancy number representations of the configurational energy are discussed. When the sites of the site array are equivalent due tospatial symmetry, the configurational entropy is symmetrical for any pair interaction model. Asymmetry of the configurational entropy implies the presence of some n-site interactions, n equals 3, 5, 7,... . Application of these results to order-disorder alloy and physical adsorption systems is considered. (Author)

Descriptors :   *CRYSTAL LATTICES, *ENTROPY, *MOLECULES, *SOLUTIONS(MIXTURES), SOLID STATE PHYSICS, SOLIDS, STATISTICAL ANALYSIS

Distribution Statement : APPROVED FOR PUBLIC RELEASE