The 351 nm photoelectron spectrum of BO- is reported. Detachment to form 2∑+ BO is observed, and the electron affinity of BO is determined to be 2.508 ± 0.008 eV. From the photoelectron spectra, vibrational frequencies of 1875 ± 30 cm-1 and 1665 ± 30 cm-1 are obtained for X̃ BO and BO-, respectively, and the bond length in BO- is found to be 1.236 ± 0.010 Å. The measured EA is used to derive a bond energy in BO- of 9.39 eV. High-level molecular orbital calculations of the electron affinity are reported. The results from multiconfigurational SCF, G2, and complete basis set calculations are in good agreement with experiment.

Abstract--Infrared spectra of two minerals; Urkut quartz (Hungary) and a Swedish feldspar, of different origin with different physical characteristics and crystallinity were studied. Samples were taken after appropriate grinding, and infrared spectra, X-ray powder diffraction and water vapor absorption measurements were made along with electronmicrographs. Quantitative conclusions were drawn from changes of particle size and the ratio of bands of the SilO groups and also the degree of crystallinity and changes of the particle size, respectively.

The 351 nm photoelectron spectrum of chromium dioxide negative ion has been measured. Two vibrational frequencies of neutral chromium dioxide are observed in the spectrum, at 220±20 and 895±20 cm−1, and are assigned to the bending mode and symmetric stretch, respectively. From hot bands in the spectrum, a frequency of 205±40 cm−1 is determined for the bending mode in the negative ion. The electron affinity of CrO2 is found to be 2.413±0.008 eV. The measured anisotropy parameter for photodetachment indicates that the electron is detached from an orbital with significant 4s character.