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Results for “Be-O”

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All sourcesNASA NTRSDOE OSTI
NASA NTRS1974

The elemental abundance ratios of interstellar secondary and primary cosmic rays

We report new observations of abundances in the charge range (Z) between 2 and 10, which were obtained with a dE/dx-Cerenkov detector launched into a polar orbit on OGO-6 as part of the Caltech Solar and Galactic Cosmic Ray Experiment. Integral rigidity spectra of all the elements observed have shapes similar to that of the helium spectrum in the rigidity range of 2 to 14 GV, approaching a power law with exponent -1.6 above 8 GV. Calculations of interstellar propagation assuming a steady-state model and including the presence of interstellar helium and the effects of solar modulation predict a variation with rigidity of ratios such as Be-O and B/O, which is not observed. The data can be explained by assuming a rigidity-dependent confinement of cosmic rays within the Galaxy.

Brown, J. W.↗
DOE OSTI2020

Materials Data on BeO by Materials Project

BeO is Zincblende, Sphalerite structured and crystallizes in the cubic F-43m space group. The structure is three-dimensional. Be2+ is bonded to four equivalent O2- atoms to form corner-sharing BeO4 tetrahedra. All Be–O bond lengths are 1.66 Å. O2- is bonded to four equivalent Be2+ atoms to form corner-sharing OBe4 tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on BeO by Materials Project

BeO is Halite, Rock Salt structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Be2+ is bonded to six equivalent O2- atoms to form a mixture of edge and corner-sharing BeO6 octahedra. The corner-sharing octahedral tilt angles are 0°. All Be–O bond lengths are 1.82 Å. O2- is bonded to six equivalent Be2+ atoms to form a mixture of edge and corner-sharing OBe6 octahedra. The corner-sharing octahedral tilt angles are 0°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on BeO by Materials Project

BeO is Wurtzite structured and crystallizes in the hexagonal P6_3mc space group. The structure is three-dimensional. Be2+ is bonded to four equivalent O2- atoms to form corner-sharing BeO4 tetrahedra. There is three shorter (1.65 Å) and one longer (1.66 Å) Be–O bond length. O2- is bonded to four equivalent Be2+ atoms to form corner-sharing OBe4 tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on BeO2 by Materials Project

BeO2 is quartz (alpha)-like structured and crystallizes in the orthorhombic P2_12_12_1 space group. The structure is three-dimensional. Be is bonded to four O atoms to form corner-sharing BeO4 tetrahedra. There is two shorter (1.59 Å) and two longer (1.60 Å) Be–O bond length. There are two inequivalent O sites. In the first O site, O is bonded in a bent 150 degrees geometry to two equivalent Be atoms. In the second O site, O is bonded in a bent 150 degrees geometry to two equivalent Be atoms.

36 MATERIALS SCIENCE↗