Figure 8.

Elemental mapping of compound PM₁₀ particles (sample 14/10): (a) SEM-BSE image showing at least three different particles and some brighter inclusions within the particle in the upper left; (b) averaged EDX spectrum; (c)–(m) single element maps. Note that Al, Si, K, and Fe (c–f, respectively) are concentrated in the upper left of the particle, whereas Na, S, Cl, and Ca (h–m, respectively), are concentrated in the particles in the lower right; Mg (g) is present along with P (map not shown). Fe (f) is concentrated in the inclusion within the upper left particle (arrows). Finally, Na (h) is not present in the curved particle in the upper right, whereas Mg (g), S (i), Cl (l), and Ca (m) are abundant.