Crystal anistropy

Thus recognition of the characteristic coupling constants for an a-proton, as well as establishing the radical as of the general type R2CH, also serves to fix the direction of the C—H bond and of the carbon 2p orbital. This not only shows how the radicals are located in the crystal, but also provides a basis to which any other anisotropic pattern can be anchored. Thus, for example, the small anistropy of /3-protons can be fitted to the radical. This is not particularly informative for rotating... 

The anistropy of a quasi-one-dimensional conductor provides considerable insight into the directional dependence of the electronic structure of the compound. It is, however, difficult to measure in (TMTSF)2X salts and in some of the (ET) X salts. Because of the low crystallographic symmetry, crystal faces are not perpendicular to high-symmetry directions. Nevertheless, adopting a simple tight-binding form for the electronic energy band ... 

EPR spectra with the cubic anistropy described by Eq. (12) have been observed for Cu -doped MgO sin e crystals ). The angular dependence of the g tensor in the 100 planes is determined by 2... 

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