Nuclear Quadrupole Interactions in Beryllium Oxide

摘要: The importance of the contribution from higher multipole moments oxygen ions to electric field gradient at nuclei in a wurtzite-type ionic oxide, namely, beryllium is considered and, particular, dipole are found contribute significantly ion sites. dipolar polarizability an bound oxide lattice analyzed and value 2.19 \AA{}${\mathrm{A}}^{3}$ obtained. Using 7.0 \AA{}${\mathrm{A}}^{5}$ for quadrupolar same considering slight uncertainty associated with sublattice displacement parameter $u$, experimental quadrupole coupling constant ${\mathrm{Be}}^{9}$ nuclei, \ifmmode\pm\else\textpm\fi{}41\ifmmode\pm\else\textpm\fi{}4 kc/sec, can be explained. ${\mathrm{O}}^{17}$ also investigated presented as function $u$. In this case, do not because symmetry; contribute, however.