Accession Number : AD0636316
Title : THE THERMODYNAMICS OF M-CENTER FORMATION.
Descriptive Note : Technical rept.
Corporate Author : OREGON STATE UNIV CORVALLIS DEPT OF CHEMISTRY
Personal Author(s) : Zahrt, John D. ; Scott,Allen B. ; Coker,E. H.
Report Date : 10 JUL 1966
Pagination or Media Count : 19
Abstract : The equilibrium between F centers and M centers in additively colored KC1 was studied at temperatures between 60C and 130C. The M-center concentration at equilibrium varied approximately as the square of the F-center concentration, verifying the stoichiometric equation: 2F = M. At 60C, the equilibrium constant was 1.7 x 10 to the-19th power cu.cm. Enthalpy change = -4.1 Kcal and entropy change = -98 cal/deg, for the standard state one center cu.cm. The entropy change value agrees with that calculated from the configurational entropy, i.e., R 1n 6/N, where N is the concentration of negative ion sites. (Author)
Descriptors : (*COLOR CENTERS, *THERMODYNAMICS), (*POTASSIUM COMPOUNDS, *CHLORIDES), ALKALI METAL COMPOUNDS, HALIDES, CRYSTAL DEFECTS, CONCENTRATION(CHEMISTRY), ENTHALPY, ENTROPY, IONS, CHEMICAL EQUILIBRIUM
Subject Categories : Solid State Physics
Distribution Statement : APPROVED FOR PUBLIC RELEASE