Concepedia

Abstract

A study of the 7Li nuclear magnetic resonance in a LiTaO3 single crystal is made and the electric field gradient at the lithium site is determined. Electric-field-gradient calculations indicate that the net charge on the tantalum is +1.21 while that on the oxygen is −0.74. This shows that the tantalate ion is predominantly convalently bonded. The 93Nb resonance in a LiNbO3 single crystal is also studied and the quadrupole coupling constant is found to be 22.02 Mc/sec.

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