11B MAS NMR study of Ga1−xFexBO3 mixed crystals

K. Seleznyova (1, 2) , N.A. Sergeev (3) , M. Olszewski (3) , P. Stępień (3) , S.V. Yagupov (1) , M.B. Strugatsky (1) , Janis Kliava (2)

1 Faculty of physics [Simferopol]
2 LOMA - Laboratoire Ondes et Matière d'Aquitaine
3 Institute of Physics [Szczecin]

11 B MAS NMR Local structure Local disorder. a b s t r a c t : Mixed iron-gallium borate crystals Ga 1-x Fe x BO 3 have been studied by Magic Angle Spinning (MAS) NMR of 11 B isotope. Experimental MAS NMR spectra have been computer simulated using a laboratory-developed code. The quadrupole parameters and isotropic chemical shift for 11 B are consistent with threefold-coordination of boron atoms. A detailed fitting to the experimental NMR spectra reveals the existence of a certain local disorder in Ga 1-x Fe x BO 3 crystals.

Mots clés: borate compounds; 11B MAS NMR; Local structure; Local disorder

Domaines: Cristallographie

K. Seleznyova, N.A. Sergeev, M. Olszewski, P. Stępień, S.V. Yagupov, et al.. 11B MAS NMR study of Ga1−xFexBO3 mixed crystals. Solid State Nuclear Magnetic Resonance, 2015, 70, pp.38-42. ⟨10.1016/j.ssnmr.2015.06.001⟩. ⟨hal-01222354⟩