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The angular dependence of the chemical shift of the  29 Si nuclear magnetic resonance has been measured in a synthetic single crystal of Mg 2 SiO 4  (space group Pbnm, Z = 4). The measurements were performed at room temperature at a frequency of 39.758 MHz using the FT-NMR technique. The eigenvalues of the shift tensor with respect to  29 Si in TMS are δ x  = - 38.8 ppm, δ v  = -55.3 ppm and δ z  = - 95.4 ppm, with the eigenvector y parallel to c and the eigenvector z forming an angle of 7.5° with a. The results show clearly the influence of the individual S i - O bonds on the chemical shift tensor. The chemical shift along the S i -O bond depends in good approximation exponentially on the S i - O bond distance.

The Chemical Shift of the 29 Si Nuclear Magnetic Resonance in a Synthetic Single Crystal of Mg 2 SiO 4