Abstract As is well known to the chemist, the NMR spectrum of a liquid consists of numerous sharp lines typically with less than 1 Hz linewidth, due to the rapid isotropic molecular motion, all possible anisotropic interactions-chemical shift anisotropy, dipole-dipole interaction, quadrupole interaction etc. are averaged to zero. However, analogous experiments on solids have enjoyed a more limited prosperity (i.e., several kilohertz linewith). The reason is all these anisotropic interactions are retained and may be used to monitor the symmetry properties and the electronic state of the solid. Three techniques may be used to obtain high resolution NMR in solids-High Power proton Decoupling (HPD); Cross Polarization (CP) from the proton to the dilute spins; and Magic Angle Rotation (MAR) can produce "liquidlike" NMR spectra of a solid material.
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