Investigations of Solid State Reactions of Binary Polyphosphate-Fluoride Systems by Means of Thermal Analysis, X-Ray Diffraction and NMR Spectroscopy. - IV. Systems M(PO3)3 + MF3 (M = Al, La)
The reactions of Al(PO3)3 with AlF3 and of La(PO3)3 with LaF3 can mainly be described by the formula: .As function of the temperature the tridymite-like modification of AlPO4 (? = 30.7 ppm), the cristobalite-like form (? = 27.8 ppm) and berlinite (? = 25.4 ppm) are found both by NMR and X-ray investigations.The 31P chemical shift parameters of LaPO4 are: ? = (5.7 +/- 0.5)ppm, Δ? = (15 +/- 5) ppm and η ca. 1. - Keywords: NMR (MAS) in solids / Solid state reactions / Phosphate-fluoride systems
Ehrt, D.,Jaeger, C.
p. 97 - 108
(2007/10/02)
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