Volume 31, Issue 4, December 2002
Index of content:
31(2002); http://dx.doi.org/10.1063/1.1497384View Description Hide Description
The refractive indices of 509 oxides and 55 fluorides were analyzed using two forms of a one-term Sellmeier equation: (1) where the slope of the plot of versus in units of gives a measure of dispersion and the intercept of the plot at gives and (2) where photon energy, average single oscillator (Sellmeier) energy gap, and average oscillator strength, which measures the strength of interband optical transitions. Form (1) was used to calculate at and at and the dispersion constant A. The total mean polarizabilility for each compound was calculated using the Lorenz–Lorentz equation: where is the molar volume in Provided for each compound are: the literature reference, the method of measurement of and estimated errors in Results obtained by prism, infrared reflectivity,ellipsometry, and interference methods are compared. Consistency of dispersion values among like compounds and structural families is used to evaluate the accuracy of refractive index data. Dispersion values range from 40 to with the majority of values in the range of High dispersion is associated with and transition metal ions, , and crystalline hydrates, whereas normal dispersion values are found in borates, aluminates, gallates, silicates, germanates, phosphates, and sulfates not containing or any of the above ions. Exceptionally high dispersion is observed in liquid FeOOH, and
31(2002); http://dx.doi.org/10.1063/1.1504440View Description Hide Description
In this paper we review and assess the cross sections for collisions of low-energy electrons with boron trichloride The only available experimental cross section data are for partial and total ionization and electron attachment, and the electron attachment cross sections are uncertain. Calculated values are available for the total elastic, differential elastic, and momentum transfer cross sections, and derived cross sections have been published for vibrational excitation and dissociation. Other than some rather uncertain data on electron attachment rate constants and some measurements of electron drift velocities in and mixtures, there are no measurements of the electron attachment, ionization, or transport coefficients for this gas. Analysis of the experimental data on the electron affinity, electron attachment, and electron scattering, enabled identification of negative ion states of at about −0.3, 1.0, 2.8, 5.2, 7.6, and 9.0 eV. Because the existing electron collision data are few and uncertain, relevant data are provided for photon impact on .
31(2002); http://dx.doi.org/10.1063/1.1494086View Description Hide Description
The mutual solubilities and liquid–liquid equilibria of acetonitrile binary systems with different compounds exhaustively and critically are reviewed. The compounds include water, inorganic compounds, and a variety of organic compounds (hydrocarbons, halogenated hydrocarbons, alcohols, carboxylic acids and esters, nitrogen, and sulfur compounds). A total of 353 systems reported in the primary literature through 2000 are compiled. For 25 systems sufficient data are available to allow critical evaluation. All data are expressed as mass and mole fractions as well as the originally reported units. Similar reviews of gas, liquid, and solid solubilities for other systems are published in the of Solubility Data Series. This is the 78th volume of this series.