FAST-MAGIC-ANGLE-SPINNING F-19 NMR OF INORGANIC FLUORIDES AND FLUORIDATED APATITIC SURFACES

The high-resolution 19F NMR of solid inorganic fluorides and fluoridated apatitic materials is reported. Experimental data collected at spinning speeds approaching 16 kHz are described which demonstrate that fast magic-angle spinning (MAS) alone represents a viable alternative to multipulse techniques for effectively averaging the 19F homonuclear dipolar interactions which typically dominate the static spectra of these solids. The significant potential of fast-MAS 19F NMR as a spectroscopic tool for studying the surface chemistry associated with the fluoridation of apatitic surfaces is also demonstrated. © 1990.