Abstract
Single-crystal neutron-diffraction data have been used to refine the crystal structure of the paramagnetic cubic phase of oxygen at 46 °K. Two of the eight molecules in the unit cell are randomly oriented along the axes at the positions, and the remaining six along the axes perpendicular to the fourfold inversion axes at the positions. Associated with this disorder is a large librational motion with a rms amplitude of about 20°. Magnetic-form-factor values for 27 reflections have been measured by the polarized-neutron technique. Data were collected from large crystals subjected to an applied magnetic field of about 80 kOe in a specially designed split-coil superconducting magnet. The observed values are in good agreement with theoretical calculations described in the following paper based upon the usual molecular-orbital model with two unpaired electrons in the antibonding orbitals.
- Received 22 August 1972
DOI:https://doi.org/10.1103/PhysRevB.7.3102
©1973 American Physical Society