In all previous attempts to calculate interionic distances and heats of mixing for alkali-halide solid solutions, uniform anion-cation distances throughout a given solution have been postulated. In the present paper, the more logical assumption is made that the ions are not at a constant nearest-neighbor distance, but take up positions of minimum potential energy relative to one another. A method making use of the Born-Mayer-Huggins equation for the lattice energies of the alkali halides is developed for the determination of these positions in a simplified model and for the calculation of the potential energy associated with the resultant lattice. From these values, the average lattice constant, the heat of mixing, and the activity-coefficient ratio in the solid solution are calculated; from the latter is obtained the theoretical distribution ratio between solid and aqueous solutions. Values of the listed properties have been calculated at various mole fractions for the solid solutions KBr–KCl, RbBr–RbCl, RbCl–KCl, RbBr–KBr at 25° and have been found to be in good agreement with the experimental data available.
An investigation of the infrared spectrum of gaseous SiH2Cl2 and the Raman spectrum of liquid SiH2Cl2 results in the following fundamental assignment: ν1(a1)=2200 cm−1,ν2(a1)=953 cm−1,ν3(a1)=531 cm−1,ν4(a1)=188 cm−1,ν5(a1)=710 cm−1,ν6(b1)=2200 cm−1,ν7(b1)=810 cm−1,ν8(b2)=877 cm−1,ν9(b2)=592 cm−1.
Thermodynamic functions for SiH2Cl2 were calculated with the usual assumptions. The infrared spectrum of gaseous CH2Cl2 and the infrared and Raman spectrum of liquid CH2Cl2 were remeasured.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.