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. 2021 Feb 10;7(2):e06194. doi: 10.1016/j.heliyon.2021.e06194

Figure 4.

Figure 4

Sample 14/10: (a) EDX spectrum of an acicular calcite PM10 particle (CaCO3; inset). Small amounts of Na and Sr may be present in calcite. Minor N, P, S, and Cl peaks are attributable to the bee wing; (b) EDX spectrum of a clay mineral particle (inset) consistent with illite (K(Al,Mg,Fe)2(Si,Al)4O10(OH)2).