Distribution of principal values of the exp 31 P NMR chemical shift tensor in phosphate glasses

The static line shapes of the powder pattern of the exp 31 p nuclear magnetic resonance (NMR) chemical shift (CS) tensor in phosphate glasses can only be explained by using individual distributions parameters for the principal axes. A model is discussed, which assumes a linear dependency of such distributions from the principal values themselves. Furthermore the influence of such distributions on magic angle spinning (MAS) spectra is investigated.