Effect of Soil Solution pH during the Tetracycline Intercalation on the Structural Properties of a Dioctahedral Smectite: Microstructural Analysis

Table 2

Qualitative XRD investigations for different studied samples versus pH and %RH variation.

pH	%RH	(Å)	FWHM (°2θ)	Character
3	20	18.25	2.813	I
	40	18.87	1.412	I
	60	18.71	1.231	QH
	80	17.66	1.761	I
4	20	19.70	1.403	QH
	40	19.02	2.123	I
	60	19.53	2.910	I
	80	20.06	3.501	I
5	20	20.82	1.651	I
	40	20.25	1.767	QH
	60	20.06	2.624	I
	80	19.36	3.810	I
6	20	19.85	1.903	I
	40	20.06	1.400	QH
	60	18.25	3.810	I
	80	20.43	3.010	I
7	20	18.54	2.120	I
	40	15.65	1.560	QH
	60	16.47	1.684	QH
	80	16.49	1.708	I
8	20	15.12	2.189	I
	40	14.15	2.204	I
	60	17.51	1.904	I
	80	17.38	2.706	I

I: interstratified character; QH: quasihomogeneous character.