Chemical and Biological Technologies in Agriculture

Table 3 Quantitative evaluation of XRD data by the Rietveld method and SEM data for GC, GC–HA1, and GC–HA10

From: Exploring the synergistic effects of goethite intercalated coal in the presence of humic acids for enhanced growth of Sinapis alba

Sample	GC	GC–HA1	GC–HA10
Main phase	goethite	goethite	goethite
a, Å	4.456	4.448	4.436
b, Å	10.207	10.112	9.912
c, Å	2.992	2.989	2.980
D_XRD, nm	21 ± 4	25 ± 3	37 ± 9
D_SEM, nm	65.48 ± 12.10	66.68 ± 17.88	112.16 ± 15.32
Kp	0.95	0.97	0.98
CV,%	26.6	18.3	13.6

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